1/2 in PVC will not hold any weight. Move up to at least 2in then you can cut/glue any angle you need and it will support much, much more weight.
I can think of a dozen ways to set up a temp cabinet for one off parts. I did a frame with a pressure washer and a blasting tip and sand.. 100% safe and good results.
Give me a break dude. 1/2 in pvc will stand up to 2 in of snow on a pvc tarp stretched over a 20' 1/2'pvc 'quonset' style tent. I've made several temporary spaces out of AgBag and 1/2" pvc large enough to park a car in and work on. Making a blast area would be childs play.
2" is for those faint of heart with no faith in their engineering skills....
