Stubborn Deck Stains

[Theibis]

The deck of my 21SE has a load of black spots on it. I have no idea how they got on there, but regular soap doesn't touch it. It looks like the fiberglass absorbed it. It looks like ink or dirty oil and I scrubbed it a few times today without success. Any ideas on a formula that may work? The rough surface of the deck seems to make it harder to clean up. Thanks in advance.

 

[ryanc2]

Bleach.

 

[Mike2043]

Bleach.

I second the bleach method. I had stains on my deck and tried all kinds of cleaners with not much luck. I then tried the bleach and poof - clean deck. I poured it on straight, scrubbed it in then rinsed and let sun do the rest.

 

[Theibis]

Thanks for the info. I'll give bleach a try.

 

[andertonm]

If the bleach doesn't work, try acetone, but use it judiciously. That's what Parker told me to use to remove the excess sealant around stainless fittings. Worked like a champ.

 

[Brent]

Another option is test a spot with Bar Keepers Friend
Make a wet paste and allow to set for a few minutes before rubbing. It has bleaching capabilities along with oxalic acid and a mild abrasive.
Rinse well and wax

 

[Brent]

here is the link
http://www.barkeepersfriend.com/Cleaning.html

 

[Theibis]

Hey guys. Thanks for the tip on the bleach. It worked like a charm. Found out that guys are going down to the dock at night and catching squid using spotlights to attract them. The squid ink was the problem. Now I have to try to keep these jackasses off my boat at night.

 

[Bryan 2530]

Squid ink is a killer. Are you docked near an overhead light?
They can squirt ink pretty far so they may not be climbing on your boat but if they are, I agree with Fish Factory on this one.