One thing to remember about the pressurized pots is that they don't use as much air as the older siphon style pots.
Harbor Freight keeps several different sizes - and by having your own blaster you can control what happens to your precious tin. I too have heard many horror stories about "Professional" sandblasters that have destroyed perfectly good sheet metal...
Practice on the frame first, and by the time you get that done you will have a good feel for what you can and cannot do.
Good Luck!
Guy
