Design of tiny Powder Coating booth

I have restored a 1939 Chevrolet Business Coupe with a 400 cu. in. Chevy small block. I am interested in powder coating some small parts/engine brackets. I bought a powder coating outfit from Harbor Freight and a friend gave me an electric stove/oven. So...I think I have everything except a spray booth.
Since the parts are relatively small, no bigger than a football, I was thinking about using a 48 quart Igloo ice chest. My intention was to replace the lid with a piece of plexiglass on hinges. I was going to drill a number of holes that are large enough to accept the end of the gun (but no holes near what will be the bottom when standing on end) I was going to drill a hole for a coat hanger near the one end handle and set the chest on end (handles on the top and bottom). The coat hanger would accept the polarizing contact and could be used to rotate the parts. I would think most of the excess powder would collect at the bottom of the ice chest and could be re-used. The smooth inside of the ice chest would be relatively easy to clean. Please keep in mind I will not be doing a lot of parts.

What do you think? Will I have to add a fan and filter even for this limited amount of use?

Why bother building a booth if your size is small and your use limited?

If you have a relatively dust free environment, just spray in the open?