What the balls! That's amazing, we all should wrap our guitars with a trash bag... =.=
Anyway, if you want to change your guitar into matte, well according to PRS the thinner finish would help the wood to breath abit better and it may be more responsive? I'm not too sure about it, maybe after you matte-i-fy your guitar you can tell us, but if you just want it matte, why not get sandpaper and sand your poly coat down?