from the cpr web site: https://classicplayfields.com/playfields/
1. CURE DATE
OPEN UPON ARRIVAL. DO NOT LEAVE BOXED UP. LET PLAYFIELD SIT IN OPEN AIR.
Due to the swift post-production distribution of playfields to waiting customers, it is almost certain that the polyeurethane clearcoat on
your new playfield when arrived in your possession is only 2 to 3 weeks old. Therefore, the cure date for your playfield is recommended
to be 30 days after receipt. Mark your calendar, and don’t skimp on the 30 days. 45 days is even better.
In the meantime, you CAN perform your swap before the cure date if you want. This can be a time consuming and meticulous
process, even for the experienced. So if you want to get a head start, go ahead. Completely swap, just don’t play on it.

this playfield is now 4+ years old. buyer never mentioned inspecting the playfield prior to buying if from another person who bought it from who? how was the playfield stored for 4+ years, was it climate controlled? was it stored vertical or flat?

you should get your money back from the the guy you bought it from for not disclosing the issues prior to you buying it. if he did disclose the issues and you bought it anyway then you made a bad decision and need to live with it.

nobody in this hobby is going to warranty a product for 4+ years. there was another thread about this same type of thing where someone bought lamp sockets from marco and 3 years later there were issues and he wanted it warranted ( LMFO ) nobody is going to do that.

maybe next time you inspect the item prior to purchase?

and if you have a 'paint' problem on a car you bought from some guy off the street do you think the car dealership is responsible for repainting the car?
even if that car has a warranty you take it back to the "dealership" for the warranty, you don't put it on an airplane and fly it to Dearborn Michigan and demand the executives at FORD Motor Company fix it for you.

you should either get a refund from the guy that sold it to you....or.....try contacting pps, although i doubt they will do anything about it since you are not the original purchaser and it was purchased 4 years ago

http://www.pinballdecals.com/MirrorCabinetPartsPage.html