I had a pilot some years ago who asked me what was causing the chafing marks on one of the flap vanes...he thought I was taking the pi55 when I said -''its being caused by the anti chafe tape''
I then ripped off that section of tape from under the wing (it was hanging loose) and fixed the problem - after the horse had bolted of course
.
Naturally the tape gets replaced on servicings but the adhesive is not oil proof LOL