Quoted from Returner:Ghosting inserts and tiny white lines around them will happen on most playfield as the wood shrinks and expand over time. But it should not happen on brand new playfields, even Stern admitted this with the Ghostbusters and replaced all the affected playfields.
Sterns clearcoat process has changed a lot sinse this thread was started, it's becums thinner and thinner. Now it looks just like the first thin mist layer you put down before you fully clear. No one knows how this playfields will hold up in the long run yet.
I'll rather thake a JJP playfield with minor crackling/chipping around posts than Sterns ribbing, warping, concave or convex, just look at the plywood Stern is using compared the other manufacturers.
I do not believe you are right. I have had several Sterns in the past 24 months, some are perfect, some are not, some have very thick clears (which is not good really).
Unless an insert is protruding, or cracking, I really do not care... These machines are not pieces of art, they are to be enjoyed played and make money.
Do I want to have a perfect PF? sure, but it is not realistic as wood expands, and things happen. We are lucky modern machines no longer use incandescent flashers as those things would burn almost any insert and the heat these use to produce accelerated wear dramatically...
Ghosting today is nothing compared to what the issues back then were. Some PF are more problematic than other.
That said, clear coat thickness does not seem to be important and in fact I would say that it would promote issues when applied too thick.