Heres a pic of my HS2 playfield clearcoated by Playfield Renovations back in 2005. It started initially as a NOS playfield I bought from Ebay.
Not a single sign of ghosting until a few months ago. I blame it on changes in surrounding temp and humidity as the playfield was stored in a drive-up (non-climate controlled) storage as cab was worked on. Before then it was in the cab and normally used.
Stern is seriously screwing with you people.