GonzoF1, also suggest trying a stripper first. If newglass is like poliglow (and it looks like it is from their web site) try a commercial acrylic floor wax stripper first. Our boat was poliglowed by the previous owner. Stripping a little at a time using Zep wax stripper and a white 3-m scrubbie got most of it in the first pass. I ended up stripping it again this year, as I kept finding poliglow spots. After stripping, then do your wet sanding. Poliglow does not wet sand well so suggest stripping first.