My paint booth.......like most previously mentioned....painted mine white ,with basic white latex house paint. Later.....after a day or two dry time , I mounted basic window glass to the three overspray sides and bottom with regular clear silicone & allowed that to cure. Been using it for better than 15 years now...still same first paint job. As it gets dingy. ...a single edge razor blade & lacquer thinner dampened rag.....GOOD as new.