ready to paint,all holes,nicks filled and sanded.going to prime first, but unsure of what grade wet sandpaper to use? paint on the boat is actually pretty good considering the age (1985).changing the color from a creamy yellowish to a semi-gloss white.what number of wet paper should i use to sand before priming,(to rough up the surface) and what number of paper in between the primer and the first coat of paint? plan on putting(2) coats of semi-gloss. am also going to paint a navy blue stripe over the white to duplicate the original decal that was on the boat.