Haven't done this yet, but it's on the list..
I'd be careful with the higher percentage.. Too high and you can "burn" the cases (a "bloom" pattern is the usual description) and that can't be fixed (well, paint...)..
From what I hear, the sunlight (UV) is very important...
There was someone who used Vanish (Napisan??) with no peroxide and got pertty good results...
desiv
