i often need to spray paint my props, and overspray is such a mess. i need a quick & cheap solution. tested method, works pretty well.
Step 1: 1 Big Cardboard Box
preferably cover open from side, anyway you can modify it easily with cutter & duct tapes.
Step 2: Range Hood Filter
can use any replaceable cloth or paper filter, cut to windows size.
Step 3: Cut Windows & Clear Transparent Plastic
make a window for light & see inside, tape the window & filter down.
Step 4: Cut Hole Big Enough to Fit Your Arm
Step 5: Start Spraying
put your art piece & spray paint inside the box, close the cover, pick up the spray can & start spraying. Do not open box immediately, let the overspray settle first, about 5 minutes, then only open the cover :)
watch video for better explanation: https://youtu.be/ZGmvEVpD2gI