dude...this is hard aluminum...i don't think 400 would do shit to it...it's rough to begin with...i think he wants to make it like a polished wheel look...you would need to start with something like 60 and go at it till it's smooth...then move onto the finer grits.StarScream430 said:Dremel cuts to quickly and doesnt cover enough surface area. (its only good for hard to reach places)
Sanding by hand with various grit paper 400,600,800,1500,2000 then using a polishing wheel and some good sears Craftsman polsihing compunds (white, brown) and buf it till it shines!
the end.