That's a quick discussion. Those warts were cause my sitting in an Eames chair listening to Class D amps. The high frequency switching interacts with that older glue in the bent plywood. At least that's what I read somewhere on the web!!no matter what the subject starts out as on WBF it always ends with Horns and Tubes.
I'm going to do an experiment and start a thread on anal warts and let's see what happens LOL