I built a prototype body, with an Ibanez EX series neck and hardware. The body wood was a maple butcher's chopping block table. It's heavy as hell, looks brutish, but it just growls. Loud, obnoxious, and arrogant. Just the way I like it!
As I was cutting it, I discovered that the router bit burned it nicely. So... torched it! Got the propane torch, and started scorching the whole body black. Wiped off the loose ash with a rag, and started layering on polyurethane. Turned out well enough, is comfy and playable. And the EMG's make it snarl and growl like a wolf.
But... it's still crap wood!
My third and final invocation of this design will have a longer top horn, white ash body, quilted maple top, carved, and fireburst top. THEN burnt soot black!
My current test body, which is letting me figure out all my carving ideas, is nothing more than a 2x8" of pine, glued up. It does the job for test-shaping! So your idea is quite valid to do your PRS sculpting, just as I am. Where's those pics...