My new Spray Booth in progress

Gip is the man!

How you doing my friend?  

Good to see you putting your knowledge to good use on here again.

Thanks Styrene.

 My original idea was for a perforated table to use for the vent.  However, the foam core board is almost impossible to drill, so I went with the vent idea.  In the final version, I will do as you mentioned and use a perforated metal sheet.

 As far as the second point, you taught me something and I will use this in the final version.

Thanks millions for your input.

Ted,

Your downdraft booth looks pretty good, and it looks as though you've put some thought into it.  Having said that, I hope you don't mind a couple comments.

Typically, most downdraft booths use the entire lower surface as an exhaust area, rather than having a couple exhaust ports, as yours seems to have.  Since you already have what appears to be a plenum beneath your spray area, you might want to consider installing some perforated board or even a wire mesh in place of the solid surface you now have, and cover that with a paint pre-filter.  This will help even out your airflow and also ensure more complete vapor capture. (For comparison purposes, the Artograph downdraft uses 2 layers of paint prefilters over an activated carbon filter.)

Lastly, I don't know whether you've inserted your model just as a prop or not, but all painting on a downdraft booth should be accomplished directly on top of the booth surface.  Since downdrafts only require about half the airflow of a typical side- or back-drafted booth (50fpm vs. 80-100fpm), keeping your work close to the airflow ensures more complete vapor capture (Another good reason for converting your total lower surface area to have vent capability).

Hope this helps a little.  Keep up the good work!

Gip Winecoff