painting magnum rims

I know this is a simple answer  but are the painted gloss or flat black  or do you paint it gloss then try and get it to flatten a little       thanks for any help   then there is another question on the quarter panel seam  the car had plastic filler in the seam  it was a vinyl top car rust lifted the filler out of the seam  I was thinking if I welded the seam shut  prime it and then put a metal patch in the seam then skim coat it with filler  do you think it would crack at the seam  I thought if I closed the seam it wouldn't rust  it is heavily pitted now  the rest of the roof just surface rust     thanks jim

thanks for the reply that help with the rims  the seam would be filled with about a half an inch of filler I just thought that would be too thick and would shrink in time  I would put in     in thin layers  and let it set good but if i fill the seam with metal it shouldn't shrink as bad  it will be a painted roof  thanks jim