The solution is a thin layer of clear protective polycarbonate that will protect the playfield as well as give it a glossy finish. Better alternative to cutting and sticking mylar or more time intensive clearcoating of playfield.
.75mm Makrolon product
fits the game layout,
long time protection
can remove without any problems
ball rolls smoother and quieter
protectors equalizes unevenness
The playfield protector is cut to the outline of each playfield and comes with protective film on both sides that gets peeled off. To install the playfield will need to be partially stripped down, and varies based on the game itself so as to lay down the protector without anything in the way.