You can't make him stop doing this. The only thing you can do to get in his way is by making a better product that sells better than his.
Trying to stop him would be bad, but making fun of him is fair game. Sure, he's within his rights to do this, and people are within their rights to pay if they want. However, it remains pretentious twaddle to pretend that cheap camera + CLA + a bit of veneer = precious object. And we are within our rights to say so.
I just got in from the auction site an Argus 21 that really needs a re-covering. The existing leatherette is peeling badly, but in unbroken pieces, so cutting templates shouldn't be too difficult. I just might redo it in veneer just for the heck of it.
I suggest leaving about 1mm on all sides of the teplates. Leather is a bit stretchable and wood isn't. After the slightly larger veneer is cut, you can test fit it on the camera and cut off the rest. Good luck and have fun with the redo.
The pencil-rubberband glueing technique is not pattented. You're alowed to use it if you want.