Jim, search "Damp-Sanding a 1956 Chevrolet Belair", Mike Phillips used 2 Unigrit 3000 Foam Finishing Discs to sand entire car prior to buffing. Lots of pictures.Jim C;35780 said:lariat the meguiars unigrit are the 3m trizact discs in a different box and you arent going to do a whole car with 2 discs. of course you can but after a door or 2 it wont be doing anything.