paint booth

If you can, run the booth, positive pressure. Grab an old squirrel cage fan . I'd be careful with a box electric fan pulling exhaust... you have a flammable media being pulled out by something electrically driven, think of the possibilities!

http://autobody101.com/forums/viewtopic.php?t=10122

Here's a pretty good one from what I remember
http://www.60impala.com/private/HomeMadePaintBooth/


Do a google search and you should find plenty of info.