Thankyou to all who have responded to my question.
The situation has changed slightly. The wires will be jacketted with
Polyvinylidene Flouride (Kynar) instead of PTFE.
Would there still be a requirement to 'etch' this material?
There has also been a suggestion to epoxy pot rather than polyurethane,
(better adhesion?)
Any more wisdom would certainly be appreciated.

regards,

Phil.

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