Removing Baked on Fouling.

[Wandering Star]

I’ve just purchased a new to me, Rival 32. I haven’t even viewed her yet (!!!) but her history seems to evidence she was a 2011 AZAB participant but sadly left neglected after returning home. Her topsides colour is red and original gelcoat by the looks of it. Anyway, she’s been out of the water for many years and (from pictures) she appears to have baked on grass/slime/foul all along her waterline and above onto the topsides by about 6”. It looks as though this “scum line” is really, really baked on.

So my first question (of many I’m sure), is, I don’t want to damage the topsides gelcoat which otherwise looks to be in quite reasonable condition, how can I soften up this baked on fouling? Would Patio Magic work? Any other ideas?

 

[ChromeDome]

Dry ice blasting.

Comes at a cost but the fastest and (for you) easiest way.

 

[James_Calvert]

You might be lucky with just soap and water and a sponge...

Worth a try anyway.

 

[Bodach na mara]

I'd start with a pressure wash and take it from there. If it is an eroding antifouling, a lot will come off with the wash. The stuff stuck to the topsides will need persuasion with a scrubbing brush however. Here, you'll not want to be too aggressive or you will remove the gloss (if there is any).

 

[Pye_End]

As above then move on to oxalic acid.

 

[Beneteau381]

I’ve just purchased a new to me, Rival 32. I haven’t even viewed her yet (!!!) but her history seems to evidence she was a 2011 AZAB participant but sadly left neglected after returning home. Her topsides colour is red and original gelcoat by the looks of it. Anyway, she’s been out of the water for many years and (from pictures) she appears to have baked on grass/slime/foul all along her waterline and above onto the topsides by about 6”. It looks as though this “scum line” is really, really baked on.

So my first question (of many I’m sure), is, I don’t want to damage the topsides gelcoat which otherwise looks to be in quite reasonable condition, how can I soften up this baked on fouling? Would Patio Magic work? Any other ideas?

As above then move on to oxalic acid.

My view as well

 

[Momac]

 

[Fantasie 19]

Lots and lots of water .. hose and pressure.. it's organic so that should soften it.... eventually...