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My only problem with these are that the plastic on them is always somehow smudge/frosted enough that you cant read a thing.
Maybe that's a reason not to put plastic on them.
I mean, they exist for how long already?
Plastic? We have plenty of them here and none is out of plastic.
Is their not a plastic sheet covering the posted maps and signs? Like the structure is wood, but most I have seen have a plastc covering over the display.
And ya sometimes the scratches and smearing and graffiti makes it unreadable.
We mostly have metal plates or a pin board with glass. People take care of them.
The bougie ones have glass... That might be what they are referring to.
I do a lot of hiking and most often it's plastic. Weirdly you find the glass covered ones in usually boring trails in small towns that seem very rarely traveled. I have even seem some that are just cork board, with nothing covering it. The pages are either lamented, or less desirably slipped into a 3 ring binder type sleeve and stapled.
Those lesser traveled locations probably have lower rates of vandalism. Also, lower budgets, glass is cheaper than acrylic or polycarb.
At least here the actual papers and stuff pinned to them are covered by a locked hinged window made of plastic.
We would use a secure glass for this purpose. Plastic would be seen as "cheap" and unwelcoming.
I think it's partly UV and partly being cleaned with paper towel. I think cotton is much softer on a micro level.