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Old 01-01-2025, 04:38   #76
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Join Date: Apr 2024
Location: Seychelles is vessel base
Boat: Leopard 51 PowerCat
Posts: 300
Re: Old Wives Tales

Bleach based cleaners and gelcoat…

I get ten different answers, hoping somebody here can be definitive?

Not yacht, it is a 20 foot Speedster jet boat - around 20 years old. Gelcoat bottom, not antifoul paint.

After 3 weeks in salt water estuary, there is usually a slimy algae and occasionally tiny (like peppercorn) limpets. My usual product is Starbrite Hull Cleaner, which works ok but it is a bitch of a process lying under boat and applying it with a nylon & foam pad, but it does work, taking care to follow that with soap and very good rinse. Its a active ingredients are 2-Butoxyethanol (basically a surfactant) and oxalic acid. It is very unpleasant when it drips in your eyes…

On some forums people swear by sodium hypochlorite (essentially a bleach) in a soapy mix. Others swear by hydrogen chloride (pool acid) in a soapy mix. Bleach would to my mind def be bad for steel.

I would kill for any suggestion that basically just means pressure wash worst off, dip brush/broom in wonderproduct, leave for x minutes, then pressure wash off.
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