They work great,but its a sucky job...
I just did 2 snowplow blades and frames with one just like in that picture...I wasn't very impressed with it--takes forever to refill thru that dinky opening,and I spent more time taking it apart to unclog the valves and hose than I did sandblasting..

glad I wasn't the one who paid for it!..
I guess "Black Beauty" sand is too course for that one,it worked much better with "Play Sand" I got at Lowe's for kids sandboxes,its a finer sand like a beach has..that said,I spent more time waiting for the compressor to catch up than I did actual sandblasting,and it was a 5 hp 60 gallon one,not a lightweight!..sandblasting IS the absolute best way of removing ALL the rust though,even down in the pits and pores of the metal though..But it sucks having sand even where the sun dont shine,and getting dust in your eyes..----in the end,I used an air drill with a wire brush to do most of the rust removal,,so I could get them done before spring!.
We had a larger one at the junkyard--it held a whole 100lb bag and then some--needed a huge compressor to run it though..a gas powered one that you can tow behind a truck like they use for jackhammers is the best one for sandblasting...plenty of CFM's,and portable,no electricity required..but we got by with the usual shop compressor OK,just had to wait a lot for pressure to build..you can kill a compressor fast sandblasting,it runs constantly,and is sucking dust in too,so keeping it away from the blasting area is a good idea..
I'd say save your money and buy an "ALC" sandblaster that is pressure fed,and holds at least 100 lbs of sand..those "China" ones are OK for light duty,but I've already discovered you cant get much for parts for them--you have to adapt other brands to them if you need a new gun,etc..I'd avoid "Siphon Feed" sandblasters,the pressurized ones are WAY better..
We copied the ALC blaster we had at the boneyard, and made one nearly identical out of a 100 lb propane cylinder...cut off the top and inverted it,welded it back on,cut the center out and made a "plug" out of a small block chevy harmonic balancer pulley that we welded the bolt holes shut,and added a handle to its center hole--used inner tube rubber for a gasket to seal it...welded in bungs just like the ALC unit had and installed ball valves from Home Depot..
....it worked as good or better than out "store bought" ALC unit did,and I liked using it better than that one..I put the whole thing on an old lawnmower deck so it could be wheeled around--it was well worth building it..
