It won't be the sandblaster that will cause the limitation on what you can accomplish, it will be the air supply. You need a very good supply of air. I have a 7.5hp 2 stage compressor, and it does not quite keep up with the sandblasting operations.
If you do have a good air supply, then a pressure pot like you show is a little on the small side, but will get the job done. And, of course, make sure you use a good mask with particulate filters.
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