I found out first hand that you must have a huge air compressor to do sandblasting. I have a 6.5 HP 60 gallon compressor and it wouldn't even begin to keep up when i bought a cabinet.... It was so bad it was either get a much bigger compressor or take the cabinet back to harbor freight...... I returned the cabinet. So, unless you have a huge compressor, don't waste your money on materials, take it to a pro.