Electronic potting materials experts..........Holley EFI

Try 3M Safest Stripper. Years ago they made it in a black jug, looked like pudding, non toxic, no bad smell, it would remove bondo. They reformulated by now, not sure what new stuff does.

If you want to fix it, do not use the mill, chip a component you let out the magic smoke inside. :)

With heat, keep below 125C, or parts may also fail.