Refinished my Baer TRS with NP3. It appeared to add some thickness to the slide/rails and made the slide/rail fit even tighter. If I had to do it over again, I would only finish the frame and slide. I had the whole gun refinished and the coating on the hammer/sear changed my trigger pull weight. The finish also appears to have worn slightly from contact with the kydex holster. The finish has not worn through, but it appears duller than the rest of the finish. I should also add that Robar's customer service outstanding.
Mike