I am having issue with nason ful thane pw7 color code. I have 4-6 coats on and sanded 1500,2000, and 3000 trizact. start buffing all is ok using perfect it ex rubbing compound about 1000-1200 rpm. Starting to see rings showing up kinda like going through first coat and can see next underneath. anyone know what could be issue. have considered blocking it all down with 800-1000 and clearing with 2 coats of clear.