Compressors come in two sizes, too small and too large. These little "sandblasters" are like opening up the end of the hose – they go through a lot of air. My advice is to get the largest compressor you have room for. Of the Harbor Freight compressors, it looks like the 17 gal. 1.8 HP 150 PSI Oilless Air Compressor would be a good fit.