Great Picture ! If it were me, I would use a tooth brush, try and clean all that burnt
looking stuff off. Try and determine if there is a lot of damage to the insulation of
each wire.... You may need to treat that, varnish ?
I read the piece on the hot wax and the vacuum pump, really good ! It was mostly to
promote boiling off of moisture. Lower the atmospheric pressure and water boils
off at a lower temperature.... Just as they use a 12 Lb cap on your car radiator, it
increases the boiling point of the coolant.
You have to be sure after you coat it with whatever your going to do, it has no air
pockets, it can over time promote oxidation and corrode and open up a wire....
But it looks to me the wire is in good shape ! clean it coat it,
patch that tire, and back on the road !
.