So after deciding to blast my guns before my painting project and pricing blasting media I decided it would be most economical for me to get a blasting cabinet! After pricing those I decided I need to build one! So what I was thinking that I would use a 55 gallon drum, although to do barreled actions it may need to be longer. So what is needed in a blasting cabinet? I know there need to be holes where the air can escape so the thing does not explode! Any help would be much appreciated! Also pictures if any one has built their own would be awesome! Thanks guys!