I had a similar problem last year when I got my LFM-1 but I wasn't going to breach the subject on the forum until someone else brought it up. Since you have done just that I'll relate my experience. When I unpacked the sub (minutes after receiving it, no storage time) I left the film in place on the top. My thinking at the time was that I would leave it protected in case there were any problems with the unit and it needed to be returned. After using it for about 10 days, maybe 2 weeks, and being satisfied with the performance I felt comfortable removing the film since I would be keeping it. That's when I ran into trouble like you. The film would not peel off very well and would come apart easily. I couldn't even get it all off. Beyond that, it seems like the adhesive used to hold it to the plexiglas top was somehow reactive and had attacked the plastic. Instead of a nice smooth, glass like finish it had a blotchy leather-like appearance. Gentle cleaning gave no improvement. I sent an e-mail to customer service and got immediate response from Steve and Scott. They replaced the sub pronto and were very interested since I had the first complaint on a LFM-1. After some research by Scott he called me back with some feedback on what he learned from their vendor. Yes, the adhesive will start to attack the plexiglas if left on too long. I didn't think 2 weeks was too long and neither did Scott. The Outlaws were not satisfied with this any more than I was and they told me they would be doing some further research and indicated that maybe there would be some production changes. I don't know if that ever came to pass. Since no one brought up the subject in the forum (until now) I suspected that some changes were made, but I just don't know. The replacement unit arrived in good shape and I peeled the protective film off immediately. It came off quite easily and the top looked great.
Now some bad news: Since then there has been a slow deterioration in the appearance in the top of the replacement unit. I now see a greyish blotchiness in the top. I'm guessing that the adhesive used to glue it to the top of the cabinet is reacting with the plexiglas on the underside. The sub is kind of hidden from view so it hasn't been a real big deal for us so we have just been living with it. It's not getting any better though.
Curious side note: When I originally purchased the LFM-1 I got together with a friend and ordered 2 so we could get better pricing. His unit looked good from the start and has not changed (he removed the film immediately). In discussion with Scott we wondered if there was something in my environment that would have accelerated the reaction. But our home is about as typical as you can get and there was no exposure to sunlight, temperature extremes or unusual solvents, fumes or chemicals. The only one wild guess I could come up with is that our family room, where the system is set up, has some wood paneling installed as wainscoting and I've heard that paneling can outgas formaldehyde. Even if that was true in the past I'm not sure if that applies to modern materials (the paneling is probably less than 15 years old). Now I'm curious if other LFM owners are seeing anything like this too?
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Tekdredger