Well, once upon a time, I was told that the backboard had to be "black",. (Fireproof paint) Well it was flat black latex! So he lied.
Now, we use wood stain. Black or dark gray.
For the "cusom" jobs, we have used epoxy paint. We also found a nice "edge guard", to cover the edges. It's a plastic "U" that slips over the edges of 3/4" plywood. Miter cut the corners, and you can do it in 1 piece. Mess up, and you can do it in 2 pieces. Mess up real bad, 4 pcs, and a few ss screws.

Anyone else ever heard of the "fireproof paint???
John


John