i cant get that very mirror finish to my aluminum but very close i think iam missing something??i do the hole sanding process from 220 to as much as 1000 grit..when i use the tripoli then white it is not that clear..if i use stainless then green then white it is a lot better but still not mirror clear??can i not use the tripoli for aluminum are do i have to use it..when part is done if i use the metal polishing cream it makes it a little dull???need help..thanks