Sand Blaster Guns

^^Why can't you fix it?^^ I haven't looked at them, clean it out and RTV? Add patch sheet metal/ flashing to the outside?

The biggest problem I've found with most blasters is FEED. The medial is either humid or whatever, chokes up in the feed hose
Glass bead, some guns plug up as the venturi/nozzle is too tight for media to pass through.