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Author Topic:   Bottom paint removal
rossville posted 03-15-2002 09:43 AM ET (US)   Profile for rossville   Send Email to rossville  
I currently bought a 86 15 foot center console and wish to remove the bottom paint as the boat will be trailered . Some of the paint has already come off and the gelcoat appears to be smooth and shiny .I have used a power washerer on the paint and alot continues to come off . I am wondering if there are any good products for removing the remaining paint and should I use mineral spirits after the initial paint remover for the best result. Any comments would be appreciated
OutrageMan posted 03-15-2002 10:37 AM ET (US)     Profile for OutrageMan  Send Email to OutrageMan     
Here is a thread that may begin to answer your questions.


fly by night posted 03-16-2002 11:54 AM ET (US)     Profile for fly by night  Send Email to fly by night     
I did this on my Montauk. You have to use a chemical bottom paint remover to get it all off. You can't tell my boat was ever bottom painted now. It is a pretty big job. It's worth it though. I got 3-4 extra MPH for my effort! Be careful not to harm your gel coat.
jimh posted 03-17-2002 07:27 PM ET (US)     Profile for jimh  Send Email to jimh     
The ease with which the old bottom paint can be removed depends in part on how it was originally applied.

I found that on my boat the original gelcoat had not been sanded to a rough surface (if at all), and as a result the old paint could be removed rather easily with very gentle scraping with a sharp razor. It seemed like the surface layers of paint tended to adhere to and pull off the underlying layers. That may have been the result of top coating with incompatible types of paint.

The lowest layer of paint appeared to be a greenish primer. This was not removed by mechanical means and had to be sanded off.

After I finished with the transom, I found that using the sharp scraper had caused too many small cuts in the gelcoat. They had to be sanded a little too deep to remove. So I don't think I will use that technique again, even though it removed the paint on my boat quite well.

I was able to wet sand all traces of the greenish primer, and to compound and polish the gelcoat back to a nice gloss. The transom now looks like it has never had bottom paint.

I plan to continue this project to at least take the bottom paint off the hull sides down to the chine lines so that the bottom paint will not be visible unless you get the boat on a trailer and look underneath it.

Maybe if I find a good solvent I will eventually get all the bottom paint off the hull. That's probably when I will sell it to someone with a slip or mooring and they'll put it right back on!

Kelly posted 03-18-2002 06:57 PM ET (US)     Profile for Kelly  Send Email to Kelly     
My 17' was bottom painted before I got it. I am currently using a process that involves periodically soaking the affected areas in water and applying mild to vigorous agitation of the solution where it contacts the painted boat surface. I typically use plain water(not necessarily potable), but plan on using a saline solution from time to time. Between soakings, I air dry the boat surface on the trailer and allow oxidation to further breakdown the paint. In places where the paint has been removed, the gel coat appears to be in good shape. To date, the process has been very slow, but on the positive side, my friends and kids don't mind helping and the process is not complicated or hard. If all the other work on the boat gets completed and I need something to do, I may add additional steps to accelerate the process. Hope this helps. Kelly

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