stains!

[carlton]

...however when I used Wipeout the marks were gone in minutes. Both products have Oxalic acid...

Ok - I might try that next time. Thanks for the tip.

 

[shetland536]

acid has arrived today but i am on 12hr shifts so no day light to try it out this week! grrrr.
i am thinking of using corn flour and water as a paste to stick it to upright bits rather than wallpaper paste--mainly because i dont have any!
any thoughts
LOL--cant wait

 

[Spi D]

As Oxalic acid bleaches it is safe on white gelcoat only.
Once dilluted it's thin like water. Stains simply wash off, so no need for making paste.

Always make a test before using on coloured gelcoat.

BTW: Oxalic acid can be found in it's natural form in rhubarbs
Root and leaves contain dangerously high concentrations

Here's a video of an American testing soap, bleach and oxal acid, in turn.

Grab a coffee before starting - it's long[ish]

 

[shetland536]

thanks,great video.
i spent hours with hot soapy water and a scourer to get mine to the pretty good stage its at now, i just wish i knew about this stuff a couple of weeks ago when it was proper dirty.
still, if it works on the stain i have then i will be happy.
ill try it on the shadow stain left by the old vinyl decals too.

 

[Spi D]

After the acid you need to finish with polish/wax as the surface is left unprotected.

 

[cristofer]

dark clothing

What is causing orange stains on dark clothing after washing?

 

[shetland536]

ok i have used it, and it has done pretty well. i didnt do any scrubbing, just left it for ten mins and then washed off.
i used it over the whole hull and you could see the crud coming of as you are going around.
great stuff,just wish the boat was really dirty now! lol

http://s27.photobucket.com/albums/c184/lallen1/picton speedboat 75hp mercury/dirty/

thanks

lee