Abstract: A moveable, rigid enclosure having a work platform enclosed therewithin and which is sealed against a work surface. A negative pressure is applied to the interior of the enclosure. The rigid enclosure is supported by the inner work platform, and includes a funnel-shaped bottom portion coupled to a conduit for collecting and transporting of spent blast materials and debris contained within the enclosure which is released during blasting of the work surface. Blast media is supplied to the worker by a supply conduit extending interior of the rigid enclosure. A controller is positioned within the enclosure by which the worker while within the enclosure can adjust the vertical or horizontal position of the enclosure.