Many years ago I made my own sand blasting gun.(I still have it too) For
nozzle tips,I cut off some 1/4 inch diameter bolts and I center drilled
the bolts with my drill press.Them little tips,the first time I used
them,you could see the sand wallowing out them little holes like an old
BB gun wildly wayyyy off center.Them little tips worked ok for a few
minutes.It was worth a try anyway.
cuhulin