sand blasting????????

To increase the volume add any extra air tanks that you have laying around using Tees and air hoses.
Many years ago I had a five horse two stage compressor with a 20 gallon tank. A friend gave me a 80 gallon tank from a compressor that was wore out. I plumbed it in with 3/4 galvanized pipe about 60 feet from the compressor and sand blasted with seldom stopping for it to catch up.
It also worked great for painting and I got very little water if any out the hose since the air had cooled a lot. I also installed a solenoid controlled timer to automatically bleed off the tank every four hours.