: . . .Should I just touch
: everywhere with the 60 or is 120 O.K. I'm using a randon orbital if that
: matters.

120 should be fine. If it fills quickly from soft resin you'll either need to switch to a coarser grit, or use a wet sanding technique. Either way, use a light touch. Power sanding may not even be needed. You're not trying to remove a lot of material here, so you could probably go just as fast with a piece of sandpaper wrapped around a block of wood. Simple, cheap and easy.

PGJ