Home sand blasting

I have one of those portable home blasters. Unless you have a huge air compressor you will not be able to work for very long before the air pressure drops to the point it's not effective. Also, I have found that I need to use a very aggressive grit (I use black beauty) to be effective. You will also use A LOT OF GRIT doing the engine bay, I could see you going through 3 or 4 bags (at $25 each).

IMHO, this type of blaster is really only good for doing small parts.