I took the coated wire down, because it isn't useable as a live overhead wire. Instead, I bought non-coated brass wire, thickness 1mm, and strung it up. Unfortunately it turns out 1mm is too thick, as it has a tendency to stay in shape, so if you try to pull it taut it still looks wobbly. Surely an ugly look, I didn't even bother to make a photo. The wobbliness doesn't help in securing good contact with the bow collector either.
So that went off too. Now I'm surfing the internet, trying to find uncoated, thin wire of any conductive metal. I'm surprised how difficult this is.
Of course, I could use H0 rail, as someone suggested here, or use LGB's overhead. Both of these can be bent into a regular curve that follows the curvature of the track. But I really liked the look of the thin coated wire, so I'd rather have something that does that.
There's another option: I could just use the coated wire after all, and not have a live overhead. So far I have only one loco that even uses a live overhead. That loco is far from complete, maybe I can make it fit for track power.
So the question now becomes: how important is this feature to me? Do I want it because it's "interesting"? Am I after the "honour" of having achieved it? Some soul-searching is in order. And I just realise I can string the coated wire now, for the look, and think about a live overhead again at a later date. Hmmmmm.....