Join Date: May 2002
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The type of paint stripper that you get at a building supply store is too aggressive to use on a fiberglass boat. If you use it down to the bare gelcoat, it will create pitting in the gelcoat that will have to be repaired.
If you use the type of paint stripper that is specifically designed for fiberglass boats and cars, and if you buy it from an auto paint supply store, the cost will only be a little more than the stuff from the building supply store, and you can use it down to the bare gelcoat. If the paint stripper removes all the old paint down to the gelcoat, you only need to sand the boat enough to rough up the gelcoat slightly, so the paint will bond to it, and you can lightly wet-sand it by hand.
Use a paint stripper that is designed for the job, and let it do the hard work for you.