C
coupe
The biggest issue is every one of us use different air flow systems in our booths homemade or other wise. so it is very hard to offer proper advise with out knowing the cfm you are moving through your booth. My booth for instance can change the entire air in my 60x40 shop in less than 2 min and would suck the door in if I didn't have a relief, but my shop is spray foam tight and I know my fan pulls way more cfm than generally needed. that is why I shut mine down in between coats, not ideal but like mentioned earlier letting your coats sit open as long as possible is key to a good clear job, not werth a damn for dirt accumulation but the best for the clear itself. just my two cents