Location: 31 | genesisperformance - 7/13/2013 1:56 PM
I recently picked up a project boat, it has horrible water line stains, spent the last 5 years in tonka.. anyway they are very hard and crusty and don't come off, any suggestions? It's an aluminum hull
When I was a lad I worked at a marina and because I was on lowest rung of the ladder I got the pleasure of the muriatic acid treatment. That stuff is almost as nasty as battery acid to work with, but agree that is the best way to attack that scum line.
We used to put the acid in a trigger spray bottle and then power wash it off after a few minutes, I think I even waited longer than that sometimes but obviously do some research (I was a kid and it wasn't my boat:)).
FYI, No matter how many times I would apply the acid sometimes there would always be a lingering brown shadow.
I would like to see some before and after pictures too.
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