I had one like that I bought brand new at the Daytona Turkey Run when I was building my Model-A coupe. I got it to use on the rear end housing, front axle, etc. I could blast a spot about 3 x 4 inches and it would clog. I would have to shut it down, take off the air hose to relieve the pressure, then disassemble the sand hose and valve on the bottom, clear the clog, clear out the sand hose and reassemble everything. Start up again, blast another spot, and it would clog again so I got the pleasure of doing the whole process over again, and again, and again. I was sifting the sand when I put it in, but it didn't help. I tried two other nozzles; that didn't help either. It did that to me abut 12 or 15 times. Blasting the rear end housing should have been a 45 minute job, but it took about 4 hours. When I was finally finished, I carried the blaster out to the street for the next day's trash pickup.

When I needed to blast my roadster frame I remembered all the difficulties the old blaster gave me, so I went and got the $15 cheapie. We had one like it when I worked in a local body shop and it never gave us problems, so I found one like it. Good luck with that one, Roger. If it works that's great, if not take a look at this... https://www.amazon.com/Jewboer-Blast...%2C183&sr=8-29