I had a Browning Superposed with a two barrel set that was cased a few years ago. The buttstock had two large cloudy areas that resembled bubbles in the laquer/varnish near the rubber pad. There was no way to get them out. They weren't exactly bubbles but they were so cloudy that they sure looked like it. They were under the surface. There was one on each side of the buttstock about the size of a half dollar. I left them that way and sold the gun down at Louisville.