Really like the PVC pipe paint booth. Great idea! What/how are you covering it? 4 mil plastic

You might want to go for a large filtered opening for AIR into booth and a smaller AIR outlet filtered.
That way you get a suction effect and not breezy coming in.Will have pics of what I have shortly, thanx for the tips!

I spray the floor with water to keep it wet. Keeps dust from kicking up and the paint dust drops on the water and does not stick to floor. Yes, water is a must for the dust

I wonder if you could stiffen the PVC pipe by filling it with spray foam or some other material.. It feels pretty stout as is. The 2 wires hanging from the top really helped. It is a temp booth, so needs to be able to go up/down easy

I built a temporary booth when I painted my car out of 2x4's. I elected to go positive with air. My thoughts were if I suck air in dirt is going to come in from under the booth. Water on the floor is a must. I sprayed the floor down between coats. For air I put the furnace blower up high on one end and filtered the incoming air through a furnace filter. Going to wrap it tonight, Figure I would shoot water through gun to see air moves and adjust accordingly? Then low on the other end I put 6 more filters to catch the paint particles. They were thoroughly plugged by the time the painting was done. Also get a fresh air mask! The fumes from 2 part paints are very toxic and can cause permanent lung damage. Roger that, thanx!