Finally made time to complete my paint booth. Figure on needing it for 4+ years so I made it with some scrap materials and some very expensive lumber. 2X window fans on HIGH through filters to provide positive pressure inside booth. Used an old (+40 yrs) ignition-proof exhaust fan from Dad's old stuff. (There WILL be a filter before the exhaust fan, need to make a frame). Not a super high pressure flow, but I will be wearing a Hobby Air hooded respirator inside unit anyways.