Has there ever been any research into why the stealth coat was so bad (unless by stealth they mean they forgot to put it on wahh ohh). From my extremely limited chemistry expertise and all the pictures I've seen of TMNT and Batman playfields. The hard coat doesn't seem to wear evenly at all but just chip and crack. And when it chips and cracks it takes all the paint underneath with it. It almost seems like maybe a humidity thing combined with the inherent vibration of a pinball machine. Trying to clean and wax the things might have even made it worse. Hard coat cracks, it's then shaken lose by at the vibrations and then you come along and clean it with a rag and end up breaking up the clear coat even more.

That's the only explanation I can see fitting with the completely random and unexplainable wear patterns on so many playfields. Wear spots under the ramps on TMNT. Wear spots in the outlines and above the apron on Batman. They're are so many playfields with bare wood exposed in places where either the ball never even touches, or the ball is moving extremely slow and the player has no real control over it. I'm exaggerating a little of course but thank god they fixed it relatively quickly and only these two games seem to really have a problem(bad batch, improper application, QC issues in general who knows). This is a perfect example of why Williams spent like 4 years testing diamond plate before they finally put it on everything.