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Hull Care, Cleaning & Detailing — Washington State

Puget Sound's cold, productive waters mean fast fouling growth — barnacles and slime can coat a hull in weeks during summer. Regular underwater cleaning protects your bottom paint, improves boat speed, reduces fuel consumption, and extends the life of your antifouling coating. This page covers professional diver services throughout Washington State, topside detailing, DIY cleaning methods, and everything you need to know about sacrificial anodes.

⚖ Washington State Law — In-Water Hull Cleaning

Only hard antifouling paints may be cleaned in the water in Washington State. Ablative (self-polishing) paints must not be cleaned in the water — haul out to clean. Per RCW 90.48, any visible cloud, plume, turbidity, or sheen in the water from hull cleaning is a violation and subject to fine.

  • Use soft brushes only on painted surfaces — stiff brushes and scrapers damage antifouling coating
  • If a visible cloud develops, stop and switch to a softer method immediately
  • Washington is phasing out copper-based antifouling paints; irgarol paints banned as of Jan. 1, 2023
  • Copper-free bottom paint options: Fisheries Supply — WA Copper Paint Law
  • Full regulations: WA Dept. of Ecology — Antifouling Paints

⚓ Port of Poulsbo — Authorized Vendor Resource

The Port of Poulsbo maintains a list of authorized contractors permitted to work in the Poulsbo Marina. All contractors must be licensed and insured; boat owners are responsible for verifying authorization before work begins. The Port's vendor/resource page is one of the best in the Puget Sound for finding vetted local service providers.

Professional Hull Cleaning — Diver Services

Professional divers clean your hull while the boat stays in the water — no haul-out required (on hard bottom paint). Most services include hull, prop, shaft, rudder, and zinc inspection. Schedule quarterly minimum; monthly in summer on high-fouling Puget Sound.

Central Sound — Seattle, Bainbridge, Kitsap

Bainbridge Divers

Diving

Experienced certified divers serving Bainbridge Island and the greater Puget Sound. Services include: hull surface cleaning, propeller cleaning, rudder cleaning, through-hull cleaning, waterline cleaning, zinc inspection and replacement, hull inspection, item recovery, mooring inspection and replacement. Available 24/7 for emergencies.

📍 Bainbridge Island — greater Puget Sound

Sound Divers

Diving

Dedicated high-quality diving services: hull cleaning, zinc replacement, damage inspection, dock and mooring maintenance. Soft and medium bristle brushes on painted surfaces; plastic scrapers on running gear. Uses only Washington State-approved in-water cleaning methods.

📍 Puget Sound

O'Ryan Marine

Diving Detailing

Serves Lake Washington, Lake Union, and Puget Sound — Seattle, Mercer Island, Kirkland, Bellevue, and surrounding areas. Hull scraping, prop and keel inspection, exterior cleaning, and algae removal. Also offers full marine detailing services.

📍 Seattle — Lake Union / Lake Washington / Puget Sound

Dockside Marine Services

Diving

Hull cleaning, zinc replacement, prop work, and mooring inspection throughout the central Sound. Licensed and insured contractor.

📍 Puget Sound

Seattle Diving Services

Diving

Commercial diving services throughout Puget Sound and the Salish Sea — including north Sound locations: Anacortes, Bellingham, and Port Townsend. Full underwater maintenance, inspection, and recovery services.

📍 Greater Puget Sound — Anacortes — Bellingham — Port Townsend

Poulsbo, Kitsap & South Sound

Friday Divers

Diving Poulsbo

Former Navy divers offering underwater hull cleanings, zinc and propeller replacement, and mooring buoy maintenance and installation. Provides detailed video inspection for every dive — you see exactly what the diver sees. One of the standout services in the Poulsbo/Kitsap area.

📍 Poulsbo, WA — listed Port of Poulsbo authorized vendor

Seawolf Marine Services

Diving Poulsbo Area

Underwater hull cleaning, zinc and propeller replacement, and light salvage. Serves Poulsbo-area marinas. Also listed on the Port of Poulsbo vendor resources page.

📍 Poulsbo / Kitsap Peninsula

Dave's Dive Services

Diving Tacoma

Tacoma-based full-service dive operation: hull cleaning, mooring buoy maintenance, prop work, commercial diving, and more. Uses environmentally safe, Washington State-approved methods for hull and running gear maintenance. A go-to for south Sound sailors.

📍 Tacoma — South Sound

Northwest Mooring Services

Diving

Marine services including towing, dock repair, and hull cleaning. Serves Puget Sound from Olympia all the way to the San Juan Islands — one of the widest service areas on the Sound.

📍 Olympia to San Juan Islands

North Sound & Anacortes

ultiMate Boat Care / Port Townsend Underwater Services

Diving North Sound

In business since 1996 — one of the longest-running underwater service companies on the Sound. Serves Port of Port Townsend, Eagle Harbor Marina, and other Jefferson and Kitsap County marinas. Pre-approved vendor at multiple marinas.

📍 Port Townsend — Jefferson & Kitsap Counties

Blerit Marine

Diving North Sound

Scuba diving services for zinc replacement and barnacle cleaning throughout the northern Sound — serves Everett, La Conner, Anacortes, Bellingham, and surrounding areas. Convenient option for north Sound and San Juan approaches.

📍 Everett — La Conner — Anacortes — Bellingham

Anacortes Marina — Contractor Directory

Anacortes

The Anacortes Marina maintains a directory of vetted contractors including diving services, hull inspection, zinc/anode installation, prop work, salvage, and 24/7 emergency dive response. For boats based at Cap Sante, this is the starting point for finding local services.

anacortesmarina.com/category/contractors

Topside & Deck — Professional Detailing & Waxing

Most services are mobile — they come to your slip. Services typically range from $200 (basic wash and wax on a 30 ft boat) to $800+ (full compound, polish, wax, teak cleaning, and interior on a 45 ft boat). Get quotes from at least two services; pricing varies widely.

Seattle Boat Detailing

Detailing Mobile

30+ years of experience in onsite marine detailing. Serves Seattle, Tacoma, and Gig Harbor. Services include oxidation removal, compounding, polishing, waxing, gelcoat restoration, teak cleaning and sealing, canvas cleaning, and interior detailing.

📍 Seattle — Tacoma — Gig Harbor

Marine Detail Specialists

Detailing North Sound

Serves Seattle, Anacortes, and La Conner — excellent for north Sound and San Juan-based boats. SeaDek certified installer. Full detail menu: compound, polish, wax, canvas, and interior. Good option for boats based at Cap Sante or La Conner.

📍 Seattle — Anacortes — La Conner

Boat Detail Northwest (BDNW)

Detailing Mobile

Pacific Northwest-focused marine detailing service. Mobile — comes to your marina anywhere in the Puget Sound region.

📍 Puget Sound region

Splash N' Detail

Detailing

Premium yacht finishing service in greater Seattle. Expertise in buffing, waxing, polishing, and oxidation removal on fiberglass and gelcoat surfaces.

📍 Greater Seattle

Deckhand Detailing

Detailing Mobile

Serves Lake Washington to Puget Sound and marinas throughout greater Seattle. Boat waxing and polishing that protects against UV damage, oxidation, and Seattle's wet climate. Mobile service to your slip.

📍 Lake Washington — Puget Sound — Seattle marinas

Bow2Stern

Detailing

High-end yacht interior and exterior detailing. Serves greater Seattle, Bellevue, Kirkland, Tacoma, Olympia, and throughout the Puget Sound. Lake Union yacht wash and wax.

📍 Seattle — Bellevue — Tacoma — Olympia

Seattle Mobile Marine

Detailing Mobile

Full-service boat repair and detailing. Services available onsite anywhere in Puget Sound or at their Lake Union shop. Includes polishing, waxing, deck cleaning, vinyl cleaning, and light stain removal.

📍 Lake Union shop — mobile throughout Puget Sound

What a Full Detail Includes

  • Wash & rinse — hull, deck, cockpit, topsides
  • Oxidation removal — rubbing compound on chalky or dull gelcoat
  • Polish — removes fine swirl marks and light scratches
  • Wax — protects and seals the surface; UV protection
  • Vinyl and rubber trim — protectant application
  • Canvas — clean, treat with 303 or Star Brite restorer
  • Teak — clean, sand if needed, seal
  • Stainless — polish and protect
  • Interior — optional; sole, cushions, galley surfaces

DIY Hull Cleaning

You can clean much of your own hull from the dock, dinghy, or by snorkeling — saving $100–$200 per cleaning visit. The key is the right tools and following Washington State's water quality rules.

The Rules for DIY In-Water Cleaning

Washington State: Only hard antifouling paint (not ablative/self-polishing) may be cleaned in the water. Any visible cloud of paint particles in the water is a violation. Use the softest tool that gets the job done.
  • Identify your bottom paint before cleaning — if it's ablative, haul out to clean
  • Use soft bristle brushes on painted hull surfaces — never wire brushes, green Scotch-Brite, or metal scrapers below the waterline
  • Plastic scrapers are acceptable for hard barnacle attachment points
  • If paint clouds up in the water, stop immediately
  • Best time to clean: at slack tide when there's minimal current to spread particles
  • Early morning cleaning in summer before wind picks up gives you the calmest water

DIY Cleaning Tools

Davis Scrubbis Hull Cleaning Kit 12-ft reach; buoyant head floats up to hull; works on boats to 40+ ft. The best pole tool for DIY in-water cleaning from the dock. Available at West Marine (~$80).
C-Pole Extension Brush Aluminum pole with soft brush head; 10+ ft reach; standard tool for cleaning waterline and topsides from the dock. Various brush attachments available.
Soft Bristle Hull Brush The correct tool for antifouling paint. Nylon bristles gentle enough not to remove paint but effective on slime and light growth. Never use on ablative paint in water.
Plastic Hull Scraper For stubborn barnacle attachment points only. Never metal scrapers below the waterline — they gouge gelcoat and destroy antifouling paint.

Cleaning from a Dinghy or Snorkeling

  • A small dinghy gives you access to the full side of the hull at the waterline — the most critical fouling zone
  • Snorkeling is the most thorough DIY method — you can see what you're cleaning; a mask, snorkel, and fins are all you need for a 30–35 ft boat in calm conditions
  • Always have someone aboard or watching when you snorkel under the boat
  • Cold water (Puget Sound averages 50–55°F year-round) — a 3mm wetsuit is worth it for extended cleaning sessions
  • Clean the waterline from the dinghy with a stiff brush and boat soap — above the antifouling paint line where full cleaning products are acceptable

Frequency Guide — Puget Sound

  • Summer (June–Sept): Clean every 4–6 weeks minimum; Puget Sound's productive waters mean fast growth in warm months
  • Spring/Fall: Every 6–8 weeks; cooler water slows growth somewhat
  • Winter: Every 8–12 weeks for boats in the water; winter sailing means less fouling accumulation
  • After haul-out and fresh bottom paint: First cleaning at 4 weeks; paint is most vulnerable early and benefits from prompt cleaning
  • The cleaner the bottom, the less work each session takes — regular light cleaning beats occasional aggressive scrubbing (which removes antifouling paint)

Waterline Cleaning Products

DIY Topside — Polish, Wax & Oxidation Removal

The sequence is always: compound → polish → wax. Compound removes oxidation and scratches (most abrasive). Polish removes compound marks and restores clarity. Wax protects and seals. For lightly maintained boats, skip straight to wax. For chalky, dull, or heavily oxidized gelcoat, start with compound.

Rubbing Compounds — Heavy Oxidation

3M Perfect-It Gelcoat Medium Cutting Compound The professional standard for heavy oxidation on white fiberglass. Medium cut; finishes well; used in boatyards throughout the PNW. Follow with 3M Gelcoat Polish.
Star Brite Liquid Rubbing Compound Good value; works well on moderate-heavy oxidation. Widely available at West Marine and Fisheries Supply. Less aggressive than 3M for light jobs.

Polish — After Compounding

3M Perfect-It Gelcoat Polish Removes light swirl marks left by compounding; restores depth and clarity. Use before wax. The correct next step after 3M compound.
Meguiar's M49 Marine Polish Marine-specific polish; excellent on fiberglass and painted topsides. Removes fine oxidation and restores gloss without wax buildup.

Tools

  • Dual-Action (DA) orbital polisher — the right tool for the job; far better results than hand application; greatly reduces fatigue; ~$80–$150. Harbor Freight or DeWalt DA polisher with marine foam pads.
  • Cutting pad — with compound for heavy oxidation (firm foam or microfiber)
  • Polishing pad — medium foam for polish step
  • Finishing pad — soft foam for wax application
  • Microfiber towels — for wax removal; never use terry cloth (leaves swirls)

Wax — Protection & Shine

Collinite 925 Marine Wax The most highly rated marine wax among cruising sailors — hard carnauba/polymer blend; lasts 6–12 months in saltwater. Available at Fisheries Supply and Defender. Well worth the price.
Star Brite Premium Cleaner Wax One-step cleaner/wax for lightly oxidized boats; removes light oxidation while sealing. Good for regular maintenance waxing between full compounds. Very popular in the PNW.
Meguiar's Premium Marine Wax Long-lasting carnauba wax; deep shine; works well on white and colored gelcoat. Use after Meguiar's polish for a complete system.
3M Marine Liquid Wax Easy to apply and remove; good for annual maintenance waxing. Works on gelcoat, topside paints, and marine metals.

Where to Buy — Puget Sound

  • Fisheries Supply — Seattle; best selection of professional marine compounds, polishes, and waxes in the region
  • Longship Marine — Poulsbo; used and new marine supplies on the waterfront
  • West Marine — multiple Puget Sound locations; full range of Star Brite, 3M, Meguiar's
  • Defender Marine — online; Collinite and professional products
  • TotalBoat — online direct; their compound and wax products at competitive prices

Sacrificial Anodes — Zincs, Aluminum & Magnesium

Sacrificial anodes protect your boat's metal hardware — keel bolts, prop shaft, propeller, rudder hardware, and through-hulls — from galvanic corrosion. The anode is a less-noble metal that corrodes preferentially, sacrificing itself to protect everything else. Puget Sound is saltwater — use zinc or aluminum anodes (not magnesium, which corrodes too quickly in saltwater).

Which Anode Material? — Quick Reference

Water Type Best Choice Acceptable Never Use
Saltwater (Puget Sound, ocean) Aluminum or Zinc Zinc (traditional) Magnesium — corrodes in weeks
Freshwater (lakes, rivers) Magnesium Aluminum Zinc — won't activate
Brackish (estuaries, tidal rivers) Aluminum Zinc (too passive) / Magnesium (too fast)
Why aluminum over zinc for Puget Sound? Aluminum anodes last longer, provide equal or better protection in saltwater, and contain no cadmium (zinc anodes often do, which is an environmental concern). Many professional services now default to aluminum regardless of boat type.

Anode Placement on a Sailboat

  • Propeller shaft — clamp-type or split collar zinc secured around the shaft between the cutlass bearing and prop; the most important anode on a sailboat with a diesel
  • Propeller — prop nut zinc or ring anode around the hub; protects the prop itself
  • Rudder — flat plate zinc bolted to the trailing edge or lower rudder stock; especially important on fin-keel boats where the rudder is separated from the keel
  • Hull plate zincs — oval or teardrop-shaped flat zincs through-bolted to the hull; on fiberglass boats these protect metal through-hulls and shaft logs
  • Keel — lead keels don't need protecting, but keel bolts do; hull plate zincs near the keel and at the keel-hull joint address this
  • Engine cooling system — pencil zincs inside the heat exchanger; replace every 200 hours or annually; commonly overlooked

When to Replace

  • Replace when 50% consumed — don't wait until the anode is gone; a fully consumed anode leaves your metal unprotected for weeks until the next dive
  • Annually at haul-out is the minimum for most boats; boats in high-stray-current marina environments (common in Puget Sound) may need replacement every 6 months
  • If anodes are consuming faster than expected — check for marina stray current issues; your diver can test with a zinc reference cell
  • If anodes show virtually no consumption — check bonding system connections; anode may not be making electrical contact with what it's protecting
  • Have your diver inspect anode condition at every cleaning visit; takes 2 minutes and saves expensive corrosion damage

Leading Anode Brands

Tecnoseal

Italian manufacturer; 30+ years experience; one of the largest anode manufacturers in the world. Nearly 2,000 standard anode shapes in zinc, aluminum, and magnesium. Excellent quality control; widely available through US marine dealers. Available in zinc and aluminum.

Martyr Anodes

mil-spec alloy construction — zinc anodes meet MIL-A-18001K and ASTM B418 specifications. Streamlined shaft anodes designed for minimal drag. Excellent choice for propeller shaft protection. Available at Defender, Fisheries Supply, and West Marine.

Camp Zinc / Bottom Paint Store

Wide selection of zinc and aluminum anodes at competitive prices. Good online source for standard shapes — hull plates, shaft, prop, and rudder anodes in all common sizes.

Zincs for Boats

Online specialty anode retailer — excellent selection of zinc and aluminum anodes by boat brand, engine brand, and shaft size. Good for finding exact replacements for Yanmar, Volvo, Westerbeke engines and common sailboat hardware.

Anode Suppliers — Puget Sound