Initially I used a cardboard box with with cheesecloth inside to catch the spray. Unfortunately a lot of the spray stays airborn and drifts out and ends up as a coating all over the shop. My current booth is a large plastic box with a hole and a fan at the back and a furnace filter in between. It works well. There is no comparison to the amount of spray that was drifting all over my shop when I used a box without the fan. I had a furnace filter alredy so my total outlay for the 10" box fan and box was under $14 at Walmart.
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