Re: What type of paint over west system
You might want to consider using a light cloth along with the resin to help seal the water out. The cloth will hold the resin together much better than resin alone. FYI- I know you did not ask about that. :redface:
Personally I would use only two-part polyurethane marine paint. As long as the surface is prepped properly getting the paint to bond wont be an issue. The issue will be water immersion. If your platform is going on a trailered boat the paint should hold up for a good long time. If your boat lives in a slip and the platform is contact with the water, all bets are off. I do not know of a paint that is recommended for constant emersion. Swimming pool paint maybe? (colors very limited)
Any paint you use should have a non-skid additive you can use to make it less slippery. In my experience the finer non-skids work as good as coarse sand. Some folks like to use sand in the paint. This will work but sand does not bond well with paint and can come off. Paint additive non-skid is made to bond with the paint and stay on.