Originally Posted by paul sparkes
Thanks, is it ok to sand the tubes or will it not damage them?
Sanding is a required step with hypalon to promote adhesion...be it glue or paint. The sanding does not need to be deep or prolonged, it simply need to be enough to scuff the top smooth layer off the hypalon and cause some "jagged edges" in the material.
Barnacles will do 10x more damage than the sanding will. Bottom paint your boat annually! I recommend utilizing a flexible bottom paint. Pettit Hydrocoat SR is my favorite. It is water based, low-odor, and can be removed easily if a repair is required.