now,i did NOT use these (105 &205) on a car!! haha! i had built a guitar and used acrylic for the sides and wood dye front and back;;clearcoated w/ 3 bomb cans of lacquer. that said,i applied it with a normal drill w/ buffing/polishing attachments. 1st) a little goes a long way.2) it really ,really works!!......you will not regret this purchase no matter WHAT it is you are beautifying ......