I just bought a set of 19" Mercury Silver Volk Racing SF Challenge last night. They were used, After I gave it a wash with Gold Class Shampoo and a Swissax brush there were light scratches on the lip and gunk build up in between the screws. I was wondering are there any safe polish so maybe I can restore the lip to a shiny finish and a safe degreaser that would help me clean up the grease built up in the cracks.