[morzh]

Tim

With most of those I was able to simply pull the wire by pliers together with the plug, both ends and then pushed the conents out.
Then when I was potting the new cap with hot glue, I used the fact that it melts the external wax on the tube for a long time (the glue keeps the temp for a while) to wipe the wax off as it is often black and dirty. It still leaves enouhg wax on for the paper to be waxy, and it is no longer that important as inside there is a fully sealed new film cap.

If the wires are not pullable just the way it is, 10-15 sec blow with heatgun on low or 5 secs on high do the trick.