I couldn't find any good write-up in other threads, so here goes.
Regarding the dozen of thin, bendable harness tabs welded all over the body...a close inspection of mine confirms that they were covered in their rubber casings AFTER the color coat. I read some folks who said the rubber coatings were painted body color, but that clearly was not the case with mine (5/71 240Z).
Anyway, since many of mine are broken off or cracked, I am looking for an authentic way to replace the black casings over these tabs. The commonly proposed solution is to use heat shrink, especially the kind that is adhesive-lined. But my issue is that regular heat-shrink comes in a sleeve and leaves an open end, whereas the originals are more of a cap than a sleeve.
I have found a few potential options online from electrical firms that make "heat shrink caps" (heat-shrink with one end pre-sealed). I will test those and report back. But has anyone else solved this issue already?