Any suggestions?

[Dry Run]

Hi, I'm currently using Y10 to remove the discolouration from the hulls of boats that are not anti-fouled. It works OK, but the discolouration comes back again quite quickly - someteimes after just a few days in the water. Has anyone got any suggestions as to an alternative product? Or some "special brew" they have come up with?

PS - have tried Special Brew, can't remember what happened!!!!

[willk]

LOL - good stuff that "Special Brew"

After you use the Y10, are you polishing and resealing the GRP with some form of wax? I'd suspect that Y10 strips all the surface protector away and discoloured water is doing the rest.

BTW, If you're using a lot of expensive Y10, consider making up a batch of Oxalic Acid and wallpaper paste - works a treat and is cheap as chips.

[Stephen-RIB]

Yep, the Y10 is good stuff for removing the staining but will leave the gelcoat exposed to staining again if you do not protect it properly. A good quality marine polish should help.

[Dry Run]

Cheers for that guys! yes, now that you've pointed out my error, I guess some form of protection after the Y10 would make sense!!!

BTW, the recipe for acid and wallpaper paste sounds great......... Don't think I could drink more that a pint though!

[willk]

Originally Posted by Dry Run

BTW, the recipe for acid and wallpaper paste sounds great......... Don't think I could drink more that a pint though!

You don't want it on yer galv trailer either!

Oxalic acid itself can be bought on ebay by the kilo in powdered form. As a solution in water it can simply be sponged onto GRP and hosed off - it works well like that. It can be mixed with wallpaper paste for application to stainless steel and to spot apply to more stubborn rust stains on GRP. Obviously the gel has to be physically cleaned off, not just hosed down. I suspect that it is the active ingredient in Y10. A kilo of Oxalic acid costs about £10 and will easily do a couple of 6m ribs, hull and supers.

[Dry Run]

Thanks, off to search on E-bay!