As said before. If FG is handled properly, you should and could finish out with SF4000. FG400 was designed to be used as a two step punch. If you want a intermediate polish look at: Sonax Perfect finish, Sonax Nano polish or Menzerna PF2300, PF2400, PF2500 or FF3000.
Sonax PF or Menzerna PF2400 is my favourites, and of these two I reach for Sonax 19 times of 20.
Sonax PF or Menzerna PF2400 is my favourites, and of these two I reach for Sonax 19 times of 20.