From the Taylor website re the static cling pickguards (they recommend taking it off when not being used):
"Advisory for older guitars (pre-1995) with nitrocellulose lacquer or conversion varnish: These finishes may be damaged as a result of using this pickguard. Always remove pickguard from guitar when not in use. All glossy finished Taylor Guitars built in 1995 or later use a UV cured finish that is less susceptible to damage, though we do recommend removing pickguard when not in use."
I have one of these static cling pickguards that I use on my 512ce occasionally, but take it off before the guitar gets put away. I kept the original backing and sleeve that it came in and store in right in the case. I usually don't need it, but when I want it, it's there. If you want to leave a PG on the guitar, Taylor recommends their clear PG.