On my Pirates, I installed good old fashioned star posts from Marco and used rubber washers from Home Depot on the slings, set all slings to 16 strength. Did this about 100 games in, after blistering (donuts) on the skinny posts began to appear. I haven't looked under the posts in the meantime, but 4 months later there was no spreading of the blistering beyond the washers.
Of course, as others have said this doesn't remove the overall problem that the clearcoat is shite to begin with - it obviously is, if blistering appeared after 100 games. I assume the entire PF will go to hell at some point but I hope not. To pay $9500 and not have my ass covered by the manufacturer angers me greatly and is completely unacceptable and bizarre to me. What a fucking hobby. These companies should be taken to the cleaners IMO. Any lawyers out there? Class action suit, anyone?
I've stopped playing it in the hope that the clearcoat hardens, I don't know if that makes any difference. Sadly, I'm going to wait until March 2020 to play again. That would be one year after manufacture to harden fully. I have over 20 other pins to play, so I'm ok to wait.
I'm 600 games on my Pirates with some very minor blistering elsewhere but overall things look ok. Personally, I don't mind blistering and even minor chips eventually, but when it comes time to SELL or TRADE this machine I will have to deal with the high standards of potential buyers and this will cost me money for something that was not of my doing.
Another huge problem was the t-nut protruding in the map hole that was gouging balls, resulting in potential ripping up of the PF. If you haven't done so already, cut that protruding bit off and change your balls, they will be cut to shit.