I've done the grinding/fill thing. ;^(
Has anyone opened blisters and washed them out with a few mls of acetone with a syringe? This would get out the nasty water & hydrolyzed polyester. Then warm and allow to dry and inject with (filled?) epoxy later.

Dacarls:
A-class USA 196, USA 21, H18, H16
"Nothing that's any good works by itself. You got to make the damn thing work"- Thomas Edison