what do you have in your spray booth covering the work surface?
A sort of yellow plastic wide stripe sticky at one edge that I found at my hobby store and that seems to be used by R/C modelers ( don’t know for what peculiar purpose ); remember to begin sticking it to the surface at the top of the booth wall and let it fall.
I have some paper (an old newpaper) on the bottom of my spraybooth.
I’m using some cheap shelf paper
I use foil, usually changing only if it gets torn.
I have a downdraft model, meaning the “work surface” is actually a filter. Sometimes I use a piece of cardboard as a lazy susan, but I usually don’t use anything.
Old news paper. I tape mine down to keep it from blowing around.
Just read a tip in the SA forum about using foil; the guy says the reflective surface really helps light up the inside of the booth. Gonna have to try that one …