RM has a product (EP689) its a epoxy sealer, that can be sanded if youd like before you spray basecoat, also, with DS30 you can sand the basecoat after it flashes off. Any basecoat can be sanded as long as you put another coat or two back over it to even out the metallic. The EP product provides excellent protection against sand scratches also. Whatever you decide to do, you will probably be ok, Im just giving my opinion as to what I would do. Not saying that I am the know it all, Im just telling you what I would do, and what I do on a daily basis. Good luck with the car Kevin, Im sure itll turn out great
Tony
Actually reading that section again Kevin, it sounds like Len agrees that sealer would be best. I am not saying its necesarry, just an added safety measure.