Quoted from Ballypinball:
Probably the guy who bought the game used that was on site
The Warranty is non transferrable so that person would need to buy a replacement
You aren't solid on your facts. Go read the JJP warranty.
30 days warranty from the day you receive your machine IF you register it within 5 days. The only things covered under a 6 mo (if you route) or 1 year warranty (if you don't) are the electronics. Almost NO ONE has a "warranty" to cover these playfield issues. Doesn't matter if it is the second owner (which yes, is also an exclusion), unless the 30 days and 5 days requirements are met the warranty isn't in effect in this case, either way. On top of that, 50% off a playfield doesn't sound like how a company is required to handle warranty issues, but again this is not a warranty issue. On top of that, JJP has in the past demonstratively done warranty replacement for those outside of warranty coverage, so this is not a hard and fast line for them.
This is a manufacturing defect that was known to the manufacturer at the time of assembly which was, quite literally, covered up. It isn't a matter of legality at this point but one of reputation and customer satisfaction, if nothing else. Producing and selling a known defective product doesn't need to be covered under any warranty. Bad publicity and/or customer feedback is likely to have caused this change in the JJP response.
Now the question is, will they be refunding all those who purchased playfields who had chipping?