Question on old style adhesive/filler

[ScaleCraft]

As I am cleaning up the remains of this Thomas boiler, I am finding piping stuck through thin shell and what initially appeared to be cold solder joints.
Then I realized it was flaking off.

Powdery silver stuff, I am thinking Alumilite.

Popping it all out for paint, most will stay put when running board assembly is put back.

Did folks use Alumilite or is it something else that color?

[bob turner]

Make a new thicker boiler.
I do that with Thomas tank cars - use tubing under the paper-thin wrapper.