http://city.milwaukee.gov/ImageLibra...SprayBooth.pdf
Here is what it takes to get a spray both approved in some citys it can be a real nightmare
But he or she approved the booth with out an air make up {is for a negative pressure in the building which can cause other problem wheter its 20 min a day 14 hr a day] .Sometimes it can be cofusing on what there after
I think you have a small problem they approved the booth that can be real problem
I work at an antique shop in Montreal after 10 years in the same locaton they came hard on him with proper exhuast and replacement air make up
cost 10,000 to comply