Building a temp paint booth

72ScampTramp said

I guess i assumed that i needed a way to allow fresh filtered air in and something to pull the fumes out

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ideally yes, but you increase potential for dust in your paint.

at a friends house I used a wet swamp cooler filter over the garage window and put a fan on a ladder outside to blow in fresh air

but doing it with just the man door open has been fine as long as the plastic is secured well.