I made mine out of 4'x8' house insulation sheets. They have a foil on one side and are black on the other. The foil is reflective witch works great for lighting and I have the whole thing grounded so the overspray sticks to the walls. When I'm through coating, I just wipe the walls down with a dry towel to remove the bulk of the over spray, than follow up with a very damp towel to remove any missed residue.
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