sand paper

do i only have to get super fine sand paper or all of them, rough,fine and super fine?

Depends on what you are using them for. For sanding putty I use anywhere from 400-800 grit. Sanding paint use anywhere from 1800-12000 grit. Sanding down mold lines and bodies use 800 for the mold lines and work your way up to 2000. Primer fills the sand marks. So if I were you get all of them becuase they are not that expensive.

Depends on what your doing. Its good to have a very large variety of sandpapers.

I have:
40, 60, 80, 100, 120, 220, 280, 300, 320, 380, 400, 600, 800, 1000, 1200, 1800, 2000, 2500, 3000, and so on.

well im only going to use it for mold lines and the body
so which would i need?