3M makes a whole range of coarseness/colours (Scotch-Brite) widely available in the US (not so in AUS).Have a look for white scourer pads from your local cleaning supplies shop.
I believe the green Scotch-Brite are roughly equivalent to P400.
STRUTH!!!...and no horrid steel specs left afterwards.
This is why I never use steel wool on any woodworking, but especially in guitar finishing.