I have used the 3m stuff and it was just as I thought it would be i.e. it wasn’t sticky back plastic or cello tape it’s Mylar
In the time I had the machines with it on it appeared to last fine, but I can’t really compare it to being on a machine for 20/30 years as some factory ones have been, I used it to protect either usual heavy wear areas or to try and stop/limit areas where wear was starting (got to try and save a few for the next generation) I was suitable impressed enough to recommend as I did above. I certainly wouldn’t want to take it up or down numerous times as it sticks like **** and has the real possibility of damaging the playfield if taken back up, so really it’s your decision. I have taken the Mylar off a couple of playfield now, and I didn’t put back a complete Mylar protector I only put back sections that I wanted to protect from either further damage or that are usual high wear areas, but these didn’t go back into commercial environments just home use.
I think that playfield total strip and clear coat is the way to go for total protection but it’s just not economical or within my skill set (he says at the moment) in some cases, they do a thin Perspex type protector that i’ve heard some good and not so good things about but you have to strip all or most of the playfield to install so it’s really up to you, give it a try, as Dr Pepper says what’s the worse that could happen?
Some would probably say never put it back?
the stuff that was linked to Ebay was not 3M , it was some sort of sail repair tape, not something I know anything about, I've ordered some anyway, however dont know what im going to try it on as i dont have any spare playfield that i would consider an expendable write-off.
I've been looking at several other sources aswell of different type mylars,
a major problem with that tape stuff I can see is its not backed with anything, so cutting it into shapes isn't going to be easy.
best stuff I used to get was full sheets of the proper stuff sent from the USA
that source dried up several years ago
another source I had was from a microwave oven factory
amazing stuff, they stick it on the inside of the mesh on the doors
it is indestructible, sticks like **** , lasts forever and remains crystal clear
that source has gone too
so if anyone knows someone who can get the stuff that goes on the inside of microwave oven doors
or knows where we can get it from
then let everyone know, it is the best ive ever seen or used.