I did my engine compartment with a blaster i got from Sears,and what a mess.I ended up throwing it away.The Sears blaster works fine but you will need a big compressor tank to keep up. I used silic sand from home depot,was $3. for a 50 lb bag.Have fun.My car was done with some kind of shell blasting so the metal was not pitted that i was told when i had it stripped and repainted.