Pic 3 shows the worst of the mylar edge lift in the right hand return lane ... NOTE ALSO - The slingshot rubber (or lack of) ... 
. Cracks me up to wonder what some people are thinking when you see stuff like this . The mylar has also been cut at the 50,000 bonus inserts in the middle of the playfield . I think that at some stage the mylar has bubbled and it has been cut to get it to lay flat .
Hi - I was working at a large amusement machine company when this era of machines was released. It was very common for us to cover the playfields with plain old 'contact' - yes, the stuff you cover schoolbooks with!
Everyone craps on about the 'mylar' but in reality it was down to a few guys like me that were doing our best to prevent PF damage. (to my knowledge) in thos days the machines NEVER came from the agents with ANY covering on the PF.
Here's what we did:
New machine would arrive and we would assemble and play it for an hour or so. Then we would take a Nikko pen (texta to you young guys) and look directly down to the PF through the glass and draw the outline of where we wanted to protect directly onto the glass. Generally the outfit I worked for bought several of the same machine at a time so we would take a roll of ordinary 'contact' and double or triple it up over the glass.
Then we would cut the contact as required to clear PB and slingshots etc. When it was chopped up I would peel the backing of the contact and spray the glue side liberally with a light mixture of soapy water and slap it onto the PF.
I would then sqeegee out any (most) bubbles and put it all together ready to site.
So all of this talk of 'Mylar' is mostly complete rubbish from my extensive experience in the industry at that time. It is just plain old contact.
Maybe that accounts for the reason it is now hard to remove - I don't know.
In the case of this machine it is very possible that I covered the PF - how scary is that????
