take a look at a sealey sb974 cabinet and don't get one smaller then that. I have the SB974 and do arms in it. Pretty sure I can turn them round in it.
My only complaint is the light is at the back of the cabinet and so I fitted a second light at the front. There is a place to fit a dust extractor and doors at each end
I use glass beads
https://www.machinemart.co.uk/p/20kg...bead-abrasive/
what size compressor have you as you need one that can deliver a lot of air, I have
this one
https://www.amazon.co.uk/Sealey-Elec.../dp/B01HN5UWLG
macafee2