YOU CAN BUY A DECENT QUALITY POLISHING KIT FOR £20, I DID MY THERMOSTAT HOUSING. GOT ALL THE LINES SMOOTHED DOWN, AND THEN POLISHED EM OUT.

IF NOT GET A PRO TO DO IT, WOULDN'T TAKE EM LONG AND I DOUBT I WOULD COST THAT MUCH.

P.S ARE YOU WORRIED BOUT A STRAY STONE THRU UR INTERCOOLER??