These plastic protectors fit underneath your plastics and keep ball strikes away from the edges. They also prevent metal parts from scraping away the artwork. The material is he same as the original plastics, but a little thinner and more flexible.
Major plastics protected include the two pop bumper plastics; slingshots; bookcase. We also include protectors for a few parts vulnerable to metal scraping on the underside. In particular, the blue triangular piece under the stairs ramp (the protector is about in the center of our picture).
We have found that Addams plastic sets had some variation in hole locations, presumably because different dies were used. You may need to enlarge the protector mounting holes slightly for good alignment.