Nannyflun, Attached please find an Autocad Drawing with the details of a dry DIY spray booth. To open the ACAD drawing download the free Autodesk program "dwg true view 2010", that will allow you to see and print the drawing. I can send you a plan for a wet spray booth where a water curtain cleans and retains the excess spray. but it is more complicated. If you abble with your hands, let me know and I will make a sketch of the other one. Feel free to give this design to anybody interested. Best Regards. Eduardo P.S. Refusal of attaching a dwg drawing. Replaced it with a jpeg copy. Very unclear. If you cannot read it please let me know and i will send it by email.