Originally Posted by kenchan

you can use rubbing alcohol as prep solvent.

for wet sanding, if the part is small i would just do it under a running faucet in my wash basin. the purpose for wetsanding is to prevent crap from buidling up in the sand paper so that you get a consistent sanding surface. i add a dab of soap at times.

but the door handles are already painted. you shouldn't have to sand anything and just wipe it down, spray your paint.