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waltzingmatilda 04-15-2002 06:25 AM

removing black marks
Last fall when I was moving my Cape Dory 26 from the marina to "the hard" I ran her up onto the dock and left a large black mark on the bow. I would really like to get this mark off the boat as it is not very attractive and reminds me of an episode I''d rather forget! Trouble is, I''ve tried various things to remove the mark and none seem to work. The mark is mainly from the rubber that is used to cushion against the dock. I''ve tried various soaps, etc., including one from West Marine called "Black Mark Remover" which is supposed to do just what I want, but nothing has worked. I can remove bits of it by using my fingernail to scrape it off, though using a paint scraper has not worked. I posted this on the Cape Dory Website and one suggestion I received was to use acetone. Does anyone out there have other suggestions, or comments on the acetone? The gelcoat on the boat is in good condition and I don''t want to do anything that will damage it. If I was sure it would not damage the gelcoat I would even try sanding the spot, but am afraid of causing some damage.
Any suggestions will be greatly appreciated.
Peter K., Cape Dory 26, Hull #42
(as yet unnamed but working on it!)

SailorMitch 04-15-2002 09:09 AM

removing black marks
Among things to try: a product called Super Clean, made by the Castrol Oil folks. You can buy it Walmart in a spray bottle. Biodegradeable and is OK for fiberglass. If that doesn''t work, try a polish on it (I use Nu Finish, which is primarily for cars but also is great for fiberglass. Also available at Walmart.) If that doesn''t work, try one of the polishes that also contains a mild abrasive -- normally used to remove oxidation. 3-M makes one but I can''t recall the name of it. available at BOAT/US, West Marine and the like, although no doubt Walmart sells something like it, too (thus will be cheaper.)

joub 04-15-2002 06:07 PM

removing black marks
I''ve used acetone a number of times on my boat to remove marks. Can''t see that it hurts the gelcoat at all and it is quite effective in removing those stuborn stains!

I always wash the area with soap and water after using the acetone just for my peace of mind, but acetone seems to be the generally accepted way to clean up stuborn marks.

Good luck

I-36 MonAmi

joub 04-15-2002 06:08 PM

removing black marks

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