Seriously, I am trying to get cement off some Nacra hulls. A friend had a driveway poured and the boat was next to it and the cement guys let cement splash all over the boat. Jerks.

So, it has a bunch of little gobs of cement stuck to the hull. I thought I could just pick them off, but I can't believe how strongly they adhered to the gelcoat! I picked a few small ones off, but some just won't come off and I'm worried about picking little bits of gel coat out if I chip the cement off.

I know Acetone is Ok on gel, but I don't know if it will do the trick. Muratic acid eats at cement, but I fear it will eat the Nacra, too.

I was also thinking about Penetrol and some other penetrating solvent like goof-off or PB Blast.

Any ideas??

I think acid will do the trick. Don't think you need the 50-50 mixture talked about in this link. I want to say I use 25% acid with success.

http://www.thehulltruth.c…cid-cleaning-hull.html#b

I don't think any solvent is going to help much.



Edited by bacho on Jul 24, 2014 - 11:35 AM.

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Greenville SC

Offering sails and other go fast parts for A-class catamarans
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I'll try that--someone else suggested CLR for exactly what I'm dealing with.

wow - that blows - i think the cement company should cover the cost

Maybe pressure wash the hulls the cement should come off

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Carl

Dart 18x2
Nacra 5.8
Acat
Windrider Rave x2 for sale
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I have used muratic acid in a 2:1 (2 water:1 acid) mixture to remove mineral deposits off my hull with excellent results. Just wear gloves.