I thought Mirco was still using ceramic clear. But that is just a guess.
Doing a google search for ceramic clear just turns into one big sales pitch from the car guys (the car guys who are selling the shit. Not, you the driver.) going all ga-ga over ceramic clear. If you expect to find anything scientific about ceramic clear, or even polyurethane paints, a google search will not get you there ( Google is the ultimate sales machine ).
The best link I can find that talks about peeling clear coat is this page from AvalonKing. But keep in mind Avalon King is in the business of selling ceramic clear.
https://avalonking.com/blog/causes-and-fixing-peeling-clear-coat/
https://avalonking.com
Here is one thing I can tell you about Mirco's clear coat.
This is a picture of the repro Quicksilver play field I bought from Mirco. Notice the scratches in the inserts. The classic Sterns used clear, transparent style inserts for most of its play field inserts. with these types of inserts you can see the light bulb sitting underneath.
IMG_8918 (resized).JPG
This is a picture from the 2nd Quicksilver play field I got for Mirco. The first play field I got from Mirco had the the clear, transparent inserts. Do to legitimate circumstances I will not bore you with, Mirco's first run of Quicksilver play fields did not have black keylines applied around 2 rollover inserts.
I hit Mirco up about this missing keylines. At at the time, I was preparing to send Mirco a play field to reproduce. He told me to add my QS play field in the box along with the other play field and that he would correct my play field by adding the keylines and return it to me. I did not have any reason to disbelieve him. So I shipped the play field back to him. The play field I sent back had the clear, transparent inserts. The 2nd play field I received had the inserts with all of these scratches in them. I hit him up about these inserts with the scratches.
Mirco's reply: (I am paraphrasing here). To address the chipping problems he was having with JJP's pinball machine play fields , he switched to a coarser grit sanding media for sanding the play field before applying the colors and clear coat. And he said in the future, all of his play fields would be sanded with the coarser sanding media. I don't know if he remained true to that statement, but the 2nd classic Stern play filed I bought from him
( Nine Ball ) has the same sanded inserts.
I'll learn to live with the sanded inserts since I have no other options. For appearance purposes, the clear on these two play fields I have bought from Mirco is fantastic. Are they going to hold up once I get the pins together and start playing them? I don't know, but I do not get any bad feelings about the clear as I work to assemble the Quicksilver play field.
I have a friend with a Ruby Red WOZ. It gets lots of play action. And the play field still looks brand new. No chipping. No pooling.
Beats me why Mirco started having all of these problems.