Salt water doesn't just dry on your boat — it concentrates, etches, and does damage that compounds every single trip you skip the rinse. This is the 15-minute routine that keeps your gel coat, ceramic coat, and hardware protected for the long haul.
Salt water by itself isn't the enemy. Salt that's been left to dry in South Florida heat — that's the problem. When salt water evaporates on gel coat, it doesn't disappear. It leaves behind sodium chloride crystals that concentrate on the surface. Every trip adds another layer. The UV bakes it in.
Over weeks and months, those deposits start to etch into unprotected gel coat and work at the edges of any protective coating. Stainless hardware starts to show surface rust. Hinges seize. Canvas stains. None of it happens overnight — it happens because the rinse-down got skipped 15 times in a row.
A 15-minute washdown after every trip will save you more money over the life of your boat than almost any other single habit. Gel coat restoration, hardware replacement, and canvas cleaning all cost significantly more than water and soap.
You don't need a full detailing kit. You need four things on the dock every time you come in:
Dock hose with fresh water
Pressure doesn't need to be high — steady flow at a reasonable angle is what matters.
pH-neutral marine wash soap
Not dish soap. Not all-purpose cleaner. Marine-specific, pH-balanced — safe for gel coat and ceramic coatings.
Soft wash brush or sponge
For topsides and hull. Nothing abrasive. Save the stiff brushes for the bilge and non-coated surfaces.
Clean microfiber towels
2–3 is enough for a post-trip wipe-down. Keep them separated from oily rags and wash them separately.
Add a ceramic-safe detail spray to the list. One spray of the right product after the rinse and before the wipe-down restores the hydrophobic layer and removes any residue the water missed.
Do these steps in order. Top to bottom, every time. Skipping steps or going bottom-to-top means you're rinsing contaminated water back over clean surfaces.
Start from the highest point — hardtop, T-top, arch, or flybridge — and work down. Get everywhere: under the gunwales, transom corners, anchor locker, raw fittings. This first rinse is removing the bulk of the salt load before any soap touches the surface.
Mix your wash soap in a bucket according to the directions. Work in sections — bow, port side, starboard side, transom. Wash with a soft brush or sponge in straight, overlapping passes. Never circular — circular motions create swirl marks on gel coat that accumulate over time.
Any soap residue left on the surface dries into a film that attracts grime and can dull coatings. Rinse each section you washed before the soap has a chance to dry. In South Florida heat, you have less time than you think — don't wash the whole boat and then rinse all at once.
Cleats, rod holders, rails, hinges — wipe each one with a damp microfiber to remove the last of the salt film. Stainless will thank you. This is also when you notice anything that needs attention before next trip: loose fittings, cracked seals, chafe damage on dock lines.
If you have a ceramic coat: spray your SiO2 detail spray onto a damp panel and wipe with a clean microfiber. If you're not ceramic-coated: dry the topsides with a clean chamois to prevent water spot deposits. The hull can air dry — the concern is mineral spots on the topsides and windshield.
Rinse your brush, sponge, and buckets. Let microfibers air dry before stowing — damp microfibers in a closed bag grow mildew fast in South Florida heat and humidity. Hang them or lay them flat.
Dawn cuts grease. It also cuts protective coatings, strips wax, and leaves a residue that attracts UV damage. Use marine-specific soap. Every time.
If the hull is hot from sitting in the sun, soap dries on contact before you can rinse it. Wash in shade, in the morning, or hose the hull down to cool it first.
A pressure washer at 6 inches can force water behind fittings, delaminate edge wraps on ceramic coatings, and physically abrade soft gel coat. Keep pressure washers at 18+ inches and use a fan tip, not a zero-degree tip.
Salt and grime collect in the channel under the rub rail and at the waterline edge. This is where you'll first see staining if you're not getting it every wash. Use your brush and get into those channels.
Ceramic-coated boats need slightly different washdown habits. The coating does most of the heavy lifting — it repels water, prevents bonding, and makes cleanup faster. But you can undermine it with the wrong products or technique.
Different docks, different boats, different coatings — the routine adapts. Ask the ClearHullCo owner directly and get a real answer for your situation within 24 hours.
Or download the printable version: Washdown SOP →