CNC plasma cutting has the ability to leave really clean edges if you have all your settings honed it. It all depends on the quality of your nozzle & electrode, plasma cutter, thickness of material, cut height, amps and cutting speed. Being Everlast doesn’t have a guide for cutting with CNC, it’s been trial and error with me. With cutting stainless, even if your settings are not correct, you don’t get much dross on the underside of the cut like you would with cutting carbon steel. I did have to sand the edges a little to get rid of a little jagged edge on the underside of the cut.
With mig, I can get a half-decent bead going when welding ¼”, 3/16” and from time to time 1/8”. Anything thinner it seems like it’s a sloppy weld that wants to melt thru the material. I guess I just have to keep playing with the settings. With tig welding it seams like you can manipulate the weld pool better.