DIY paint booth fan question

I should have elaborated...I wasn't advocating only using a respirator. I also wore a full hooded paint suit, gloves and goggles, in addition to a really good organic vapor cartridge respirator. I also wore shoes, socks, and underwear, before anybody goes off about the dangers of painting barefooted while going Commando. And I certainly didn't sit in the "booth" any longer than I had to. But back to the original post, I don't think huge air flow through a homemade booth is any benefit to a quality home-shop paint job..and in my opinion, it's a detriment.