I'm concerned about protecting the back of my S2 from buckle rash, and I found this protector. It's non-adhesive, but, there's a "disclaimer" saying that it was developed specifically for polyurethane finishes, and that it should not be put on a Nitro finish until the finish has cured for a minimum of one (1) year. But, PRS guitars are not finished with Nitrocellulose, right? So, I shouldn't be concerned? Thanks for any input you might share.