Quote Originally Posted by Mr Smith View Post
My shop is not divided at all and it is only 900sq feet. I suppose it would help to pull the air in from outside instead of the shop.
My barn is divided into a wood/work shop area 20x30, and a concrete floor garage area 30x30, equal to your space of 900sqft. When I got ready to paint my frame I cleaned out one 10' bay at the end, top to bottom and put up a plastic "curtain wall" to try to seal that area from the rest of the building. Then I pressure washed that area, top to bottom to try to clear it of dust and spider nests. I put two banks of furnace filters beneath the roll-up doors and an exhaust fan in the wall to clear fumes. Still I had a bout of fighting fisheyes in my primer. I had comments from people here regarding the contents of the building, like not even having a can of WD40 anywhere near the barn - an approach that simply does not work for me. I had friends around here that told me to "...roll it outside on a calm morning, wet down the gravel and shoot it!" I will admit I did exactly that with a few small parts that I had forgotten to do, when the spray area was re-allocated to assembly.

My point here is if you're looking for the closest you can get to a professional job on your car you might want to think about your area designated for painting, and especially the proximity of aerosol sprays that may have silicone or other nasties, and any other work you may do in the barn as you approach spray time, like spraying insecticide at the wasps flying around (yes, I did that ). There's not much more frustrating than getting it all ready, laying down a perfect pass and seeing those fisheyes form