Quoted from vicjw66:
It looks like the posts were tightened down too much on a playfield that didn’t have time enough for the clear to fully harden.
This is the real issue here. Not so much with the playfield manufacturer, rather JJP temporary workers line over tightening the posts etc too tight on a new and not fully cured playfield. Plus, when using thick clear-coat: full curing time needs to happen to allow PF to properly harden.
Every time the steel ball hits those posts, it rocks against the newly minted, not fully cured playfield and so begins the chipping, cracking and rippling. It wouldn’t matter which playfield manufacturer JJP were to use, they all would result in the same issues they have now, because of poor JJP manufacturing and over tightening of playfield items. Any playfield needs time to cure, before it is used in assembling and populating a pinball machine. It’s common sense 101.
Not seen this issue on any Stern owned by myself or friends. They have so many tables on the line, that proper curing time is given before playfield is populated and Stern experienced line workers don’t over tighten the posts etc. Cured thinner clear coats appear to be better than thicker in the science of a steel ball flying around a table at high velocities.