removing flame arrestor or filler screen

[w.michael]

I need help removing the flame arrestor (gas filler screen) from my '29 Fordor. This is a completed car, not one under construction, so I must protect the paint, etc. and do this with the tank in the car.

This is the threaded type flame arrestor, not the one with tabs.

I bought the special removal tool, and it fits perfectly, without alteration. The flame arrestor began to unscrew, came up off its seat a short distance, but now just continues to turn without backing out any farther, as if the threads are stripped. It is still tight in its threads, with no wobble or looseness.

Any suggestions on how to get this out?

The screen already has some holes punched in it, which makes me wonder if a previous owner had the same problem.

Thank you for any suggestions.

W. Michael