Originally Posted by Rick
gracie, in my experience g3 always leaves marks when done by hand. using a compunder, gives a much better finish. Use a finer compound like g10 if by hand to remove marks. Maybe Damo can comment

Rick - i'm after a quick repair, not a bodyshop finish m8

and whats a compounder?

is it one of them things used to flatten the floor - like a road-roller with no wheels