One thing that seems to almost always be present on pinball playfields is a heavy ball track along the upper arch path, and under the rebound bumper. Ball spin aggressively eats away at the surface, and its made all the worse where the rebound bumper literally hammers the ball the opposite direction. What to do about that?
I recently acquired a spec built Kings & Queens (thanks Ken!) equipped with a brand new Wade Krause playfield. What a beauty! Really wanting some extra protection along that arch/rebound track I decided to layout a pattern for a 3-mil Mylar protector. After measuring the relevant geometry, I programmed a path to cut the pattern using a drag knife in my CNC mill.
First we'll cut the pattern in paper for a test fit and positioning. Then the Mylar will be cut, positioned and rubbed down.
Step 1: With the arch metal still in place, the paper pattern is cut then lightly taped in place for a test fit and to position the piece where I want it:
Step 2: Positioning the Mylar will require some care and precision. For that, several small pieces of blue tape are cut and positioned along the inner edge of the paper pattern. Then the pattern will be removed, leaving the positioning tape. Here we have the arch metal taken off; and the positioning pieces in place:
Final Product: Its nearly invisible! I've played it extensively and can honestly say the Mylar doesn't seem to affect the ball's behavior at all. No more worries about ball track wear on this baby!
I've also now installed an arch wear protector on 2 other machines and those both turned out just as nice. Considering making these available to other Pinsiders who can supply accurate PF geometry needed to size and place the protector. Thoughts?