Pete just described my setup. The air enters at my back, moves across the work area and exits through the rear of the booth. I set mine up so that airflow goes from high to low. The reason I did this was because I knew that auto body shops use "downdraft" spray booths. I reasoned that this meant the airflow was downward to take advantage of the tendency of the particles to descend due to gravity. I don't know if this is actually how the professional booths work, but it seems to work pretty well for mine.

I would also add that it is good to protect your eyes and skin. Eye tissue is pretty porous and allows chemicals into your system. For this reason I often use a full face respirator. Your skin also absorbs chemicals. I wear latex gloves, but I am not sure that this is sufficient protection from the paints and solvents we use. If anyone has any insight I would be interested in hearing it.

Yeah, some of you are rolling your eyes thinking that I am overboard on the protection thing, but I would just as soon avoid wheeling around an oxygen tank in my later years.

Antony