Comments about Pettit Z-Spar Z Spar Hi-Hide White Undercoat Enamel A628:
I have used this undercoater with great success with various topside enamels and polyurethanes. It flows wonderfully and covers in one coat. Sanding is quick and doesn't seem to load up the sandpaper the way other primers can. Don't cheap out get thegood stuff. The top coat is only as good as the undercoat.