Best thing to do to your blasting cabinet.

We don't have a Hobby Lobby here, but I found this at Joann Fabric.

http://www.joann.com/clear-vinyl--12-gauge/1151489.html

Going to give it a try.

This stuff seems to be working well, although I don't have that many hours on it. It's thicker and seems softer than the shields that came with the cabinet. Sort of like the vinyl on a convertible rear window. Perhaps that will allow the media to bounce off without scratching so much?

The tape I bought is holding but not as good as what came with the cabinet. http://www.staples.com/Scotch-Double-Sided-Tape-with-Dispensers-1-2-inch-x-250-inch/product_649280
I had to run two strips around the perimeter, so I recommend something wider or stronger.