the plasma cutter wont cut plastics, so 360 cases are a no go with it (but i will say that im damn good at cutting them with a dremel tool lol) but computer cases could be done.
PS: awhile back i made a full size metal stencil using the cutter that can be held by a handle and painted with. I did the side of my PC with it lol
(And the paint is meant to be "cracked" like that)
As you can tell im a fan of the punisher