My New Shop!! Yiippeee!

I have used a USED squirrel cage fan from an a/c unit, in your case a 1 to a 2 tun unit would move all the air out if you need to clear fumes out.
Just mount it up in your ceiling rafters and out a roof top vent.
Our set it out side on the ground and cover with a small dog house,
all it will need is a 18''X6'' hole and these fans move a tun of air quietly and efficiently
These can be found used from a/c units that compressors or heat chambers have burnt out, I have never had to pay for one.
I mounted mine 3 tun squirrel cage about 5' off the floor in my 16 by 24 shop to paint and if I cleaned it out I would use a blower everywhere and it sucked all the air born dust out . Just a thought, or you can put an electric attic exhaust fan in Like they do in homes to remove heat.