If it were me, I would go down to the Radio Shack and get some heat-shrink tubing. A good hair dryer will do to shrink it over the wiring.
Lewis
If the wires have cloth over rubber insulation, you are better off heat shrinking the wire, or replacing the wire all together with some attractive new cloth wire from AES or Radio Daze (heat shrink connections inside of the transformer). You can try acetone on the wire. It may work for you. It may make a mess out of the rubber, though. Give it a try. You can always heat shrink or change the wiring later.
T.
:The cloth is saturated with varnish or lacquer. You can soften the varnish or lacquer with acetone. Be very careful not to get acetone into the transformer or onto painted surfaces, plastic, etc. If you have some finness about you, you won't have to worry about the exaggerated warnings others on here might give you.
:
:If the wires have cloth over rubber insulation, you are better off heat shrinking the wire, or replacing the wire all together with some attractive new cloth wire from AES or Radio Daze (heat shrink connections inside of the transformer). You can try acetone on the wire. It may work for you. It may make a mess out of the rubber, though. Give it a try. You can always heat shrink or change the wiring later.
:
:T.