How far do you break down a revolver for blasting?
What about masking and cleanup?
Anything that moves gets removed. Hammers, springs, triggers, etc.
There is not a lot of masking needed unless the gun is going to be two tone.
For clean up I first use a air nozzle to blast all the sand out at about 135psi. Then I spray down every nook and cranny with cleaner to flush out any stubborn sand and then blast it with the air hose again. Finally I go over everything with a Q-tip and take a pick to the crevices to be sure.