Sandblasting day! A few weeks ago I bought a $100 home made pressure tank Sand blaster off marketplace. Whomever built it new how to weld. They were definitely better than I am. I then bought an old Binks gas air compressor for $200. The seller told me it would make 35 CFM. After some digging I learned it's only rated for 24 CFM. That's so disappointing because the compressor head is so big! I ended up pairing the gas compressor with my electric one. The two together were perfectly matched to hold 90psi with a 3/16" nozzle. It took a full day to strip the loose powercoat. If the coating was well bonded, I didn't try to remove it and instead tried to watch the surface so the paint the would bond.
A few weeks ago we bought 2000lbs of Mason sand. We had it spread out on the trailer drying. The sand cut well and we had no feeding issues, but we did strain it into the tank. A 1/8" screen fastened to the bottom of a bucket worked really well and caught many a pebble. A little breeze and dust masks and we had no issues with the dust. We went through about 1500 lbs of sand. This being a total loss process there no way I was wasting my money on purpose made grit. The Mason sand only costed $60 direct from the quarry.