This is going to sound ridiculous but I have a Big Lots 10' x 10' picnic canopy tent (top cover only) and about 6 cheap shower curtains hung from all sides. The roof supports are great to hang items from. It's portable, can be taken down and put away when not in use, can be put up virtually anywhere and keeps your parts out of elements & dust while they dry. Cheap clear shower curtains work best so you get plenty of light. Mine has a white plastic canopy for more light. I used clothespins to hold the shower curtains together if I use it in the yard but have also set it up in the garage. Probably cost me $100 total & can even be put up in a garage to have less worry about dust or contaminants. Great for people without shops & with limited area plus not something most neighbors will complain about it especially since you take it down when done. There you go, portable "redneck" paint booth.