Portable surface cleaning apparatus

A micro-abrasion sandblast device, comprising:

• a tank for containing a supply of abrasive media and having a media outlet on a base thereof;
• a cabinet attached to said tank and providing a first inlet to which an external source of compressed gas is connectable and a second inlet to which an external source of liquid is connectable;
• a media valve located adjacent said base of said tank for receiving media from said media outlet and compressed gas from said cabinet;
• a blast hose coupler connected to said media valve for receiving the media and compressed gas from the media valve;
• and
• a blast hose having a first end connected to said blast hose coupler and a second end to which a spray nozzle having a trigger is attached;
• wherein said device includes an on/off valve associated with said second inlet for permitting or preventing a flow of liquid from said second inlet into said device such that, when flow is prevented by said valve, said device is operable in a dry-blasting mode without liquid, and when flow is permitted by said valve, said device is operable in a wet-blasting mode with liquid;
• and
• wherein, when operating in a wet-blasting mode, the liquid is first caused to be mixed with the media and compressed gas at said blast hose coupler or within said spray nozzle of said blast hose such that the tank remains dry containing only the abrasive media and gas from the source of compressed gas connected to said first inlet used to pressurize said tank.