In article ,
Cydrome Leader wrote:

Pilgrim wrote:
I have an antique steam gauge well over 100 years old. I need to remove
the bezel to clean the inside of the glass. It is threaded on. I tried
Kroil to no avail. I have a flex heat strip around the threaded area and
have heated it for several hours. Again to no avail. It seems that over
the years oil has seeped into the threads and turned to varnish. Any
suggestions? Any help will be appreciated.

What materials are the parts you are trying to separate?

brass on brass about 6 inches in dia. with the glass face.