A micro-abrasion sandblast device having a tank for containing a supply of abrasive media and having a media outlet on a base thereof and a cabinet attached to the tank and providing a first inlet to which an external source of compressed air is connectable and a second inlet to which an external source of water is connectable. A media valve is located adjacent the base of the tank for receiving media from the media outlet and compressed air from the cabinet. A blast hose coupler connects to and extends from the media valve for receiving the media and compressed air from the media valve.

A system for internal air blasting of an enclosed space includes a ground vehicle, an arm supported by the ground vehicle, and a blasting nozzle provided at the end of the arm. The blasting nozzle being configured to direct blast media to a desired surface of the enclosed space to be treated by the arm. A method of internal air blasting an enclosed space is further disclosed.