Be careful, your getting into might corse paper with 250. Just take your time with the 400, then follow with 600, 1000, 1500 and maybe even 2000. You want to keep going finer and finer. It is a process of removing the previous scratches the last grit paper left and keep it wet. Then, using a buffing wheel with buffing compound http://www.eastwoodco.com/shopping/p...roductID=15300 and then by hand with plastic polish. Remember to get them covered when your done to protect all that hard work.