posted 07-10-2006 05:14 PM ET (US)
Since you've phrased your question simply about how to repair the non-skid, I will assume that you already know how to make any necessary fiberglass and gelcoat repairs and stick just to re-creating the non-skid surface.This is actually quite easy. I've never tried this on a Boston Whaler, but I have seen it done on other boats and we used to use it for a similar type non-skid surface for fiberglass holding tanks.
You need to start by making a mold of the existing non-skid pattern from somewhere else in the boat. Wax would be the best material to make this from. Spray a patch of the existing non-skid with a teflon spray so the wax will release easily after cooling. Heat the underside of a block of wax and press it into the nonskid so that it forms the shape of the non-skid pattern. Wait for it to cool. Then, after applying the gelcoat patch (with a little thicker layer in the areas you plan to have a non-skid surface on), use the wax mold to recreate the non-skid in those areas.
It's best if you can leave the entire repair area covered in wax, so that the gelcoat can properly cure in the absense of air, so you may have to modify this process a little. But the basic idea is to use wax to make a mold. From there, I think you can figure it out.