See if you can scrape off a small amount of the brown stuff and put it in an old spoon or something and slowly heat it. Most epoxies begin to soften and break down at around 160 degrees or so. If the residue does not become soft and sticky, it probably is corrosion which needs to be neutralized somehow.

Originally Posted by Geoff Roznak
The NRA has proven itself unreliable and corrupt.
Period.