r/Sandblasting

I need a sand blaster for heavy enough work that would take different kinds of sand

I just upgraded my cabinet to a Skat Blast CAT 40 and I'm starting to think I should upgrade my compressor, too. Does anyone here have a good recommendation?

Here's how it gets used:

I use glass media to take rust, thin paint and minor crud off of smallish, mostly steel parts (some aluminum). It's important to have a smooth piece when I'm done, so my understanding is glass is the best choice here (feel free to correct me if I'm wrong).

I need to use it for 2 or 3 hours between 1 and 3 times a week, indoors.

The compressor I have is an older (2003) Campbell Hausfeld Iron Force air compressor 60 gallon, 7 HP. (The 7 HP is a lie, I've read.) Since it needs to take a break more than I do, I'm wondering if a different compressor will let me get my work done more quickly. I'm fine with a used model if that's more economical, but I'm open to any suggestions as long as it's electric and not gas/diesel.

I'm not sure how international this sub is, so if it helps, I'm in the US.

Thanks in advance for any thoughts you may have on how to get the job done better.