DIY paintbooth modification help

I built this thing a few years ago. I have some ideas and would like some feedback.

I am thinking of lining the inside with sheet metal to create an anti-static drying environment. I would put 1/2" couplings on the floor so I can thread my pipe nipples into the couplings to allow the body to dry. I am also wanting to add a door to seal the area once painting is done.

I had an idea to create a reverse fan system using pc fans to suck air out of the booth right before painting. Then turn the squirrel fan on to paint.

I thought about building one completely from sheet metal and using wood for the base and floor. Paint the whole inside white to help with the light. I am just getting so much dust from the garage. Unfortunately this is the only area I can paint in. I thought about lining the outside area of the spray area with visquene? to try to create and anti dust area, but I do not think this would stop dust unless it was completely sealed.

Any opinions and criticism is welcomed. I would like to have a good booth to dry and get the best paint jobs possible. My painting window is very narrow here in Houston so I need to make the best with what I have. I mainly use enamels for spraying

Thanks for your input.