Originally Posted by err
anyone want to answer some of my other stupid questions?
Well, I did answer a couple of them . As for how much air pressure to use, that depends on what works for you . The more pressure you use the more chance there is for distortion of the metal . The larger the orfice the more air volume you will use and the more cfm you need from your compressor. I don't know much about siphon blasters . Borrowed one once and used a 55 gallon barrel of sand to just blast the rocker panels on a car and that is when I built my pressure blaster from an old 20 gal compressor tank, with extensive modification BTW . I use a 1/8" orfice and 17 cfm at 100 psi is barely enough. You were talking about going cheap cheap and that is why i mentioned the play sand from Lowe's. It is clean enough that it has never clogged my 1/8" orfice, and it is dry. The last time I checked the price of blasting media, even at HF, it was expensive. Hope this helps . Allan