perfect job for a laser welder
Would not suggest covering the enamel with any substance. if it
starts to get soft it would just harden again. But if stuff" is on
it, would ruin it.
if true enamel it would do OK, if 2 part epoxy (ceramit) Poof! Gone.
this is a perfect job for a laser welding.
I have some contacts for trade shop laser welding if you need them