Removing RTV

I am trying to remove some RTV silicone sealant. I have carved and
scraped off most of it and am wondering what others have tried to
remove the residue left after mechanical removal. Paint stripper
doesn't work and I am trying some MEK now. Any thoughts?

John Dupre'

Gasoline, lacquer thinner, MEK, TCE will lift it off, but it will
probably still need some mechanical removal.

TCE was the long time standard, since it wouldn't harm most other materials;
but where does one obtain it today?

Peter