I've always considered removing the mylar (contact) from my KISS as well. But i've always had this feeling that it seemed to be REALLY stuck down on the playfield compared to other mylared fields that i've seen from the same era. 

Perhaps that is because of the hammering this title received in it's day?. Not sure. But this thread pretty much confirms my original thoughts, and i'll certainly be leaving mine alone.

 

I've read that day 1 mylar can do it as the paint surface is so fresh.  I don't know how true this is as Nino's had some amazing results with mylar removal on some well aged machines?  I guess you can only go by other peoples experiences....