i want to do this on my cheapo strat copy

but on the backside of the guitar.
any tips or advice?

im also gonna strip the paint on the strat copy and im thinking about making it dark green, because you dont see very many dark green strats. but im open to suggestions
Rasps and a spokeshave will do it.

make sure you know how deep you want to go on each face (the one facing your stomach and the side face) ans how far you want your belly cut to go in terms of side-to-side.