I just recently purchased a 1990 Baja Islander 190, and it looks like it was trailered through wet cement on one side. There are little spatters numbering around 20. With the biggest being around the size of a black eye pea. I'm about to use poli-glow, and would like to hear some suggestions for removing instead of sealing it in. I've tried sanding, but I can't use compound to remove the scratches because of the poli-glow. I'm clueless. Thanks in advance!