There are countless posts regarding painting fiberglass, but I did not find anything that would answer my question. How much do I need to prep the old surface. The boat is an 87', and the finish has seen better days. The floor is white, and I want to change the color to an off white, or something with a subtle gray tinge. The sun reflects off the fiberglass, and when out on the water for a long day, you get sun from all angles. I had planned on wet sanding the floor, cleaning it with acetone, taping off the grooves and compartments, and then rolling on the paint with an additive for grip. As of now, the floor is slippery when wet, and that is not a good thing. This is a small area, and I was told I would not need more than a quart of paint. Do I need to prime first? I was led to believe as long as the surface was prepped and cleaned the new paint would adhere. Any suggestions are appreciated.