My second project was a pressure assist blaster made out of an old propane tank. This was flux core welded but was leaky due to pinholes. Very hard to weld with fluxcore due to thickness of material. Used JBWeld to coat the welds of the two tank sections. Wish I had gas then - I plan on redoing the seam in the future.
The handle is angle iron, cut, bent and filled. Not too bad but a bit of a pain. It would be nice to have a tubing bender - a future shop addition. The pedal applies and releases pressure from the compressor. Great addition to this type of blast setup.
The dust collector is an Oneida Dust Deputy connection to a dead Craftsman vaccuum cannister for sand reclamation. I use volcanic sand for blasting. The blaster tank was finished with the blaster. Worked very well.