This is how I clear the air in my shop when spraying color or clear. I built this exhaust fan years ago and have improved it over the years. It doesn't move as much air as I would like but it does a decent job. This video may give you a few ideas on how to make one yourself.
If you have a project you would like to showcase at the end of one of my videos just email me a few pics and a short description to: [email protected]