Electrical – How to repair a small nick in motor windings

In answer to Mike's question about a repair kit, my first thought is to go to a local store that sells no-wax flooring. They would sell you a repair kit. Second thought is to look on Amazon, there I found a Vinyl flooring repair kit: that includes what you need for a color match. Apparently it cures when you apply heat, so I'd use my heat gun, but a hair dryer might work too. (I see that one online reviewer said it did not harden for them, but it sounds like they did not read the instructions about it needing heat to cure.)

The repair kit I had used for spot repair in the past was basically a tube of clear cement. You dabbed it on and it air cured. It was really designed to seal the seams between two pieces of flooring, but that was where I needed it.

If you are unsure about how to do something like this, a great idea is always to find a scrap to practice on. That local flooring store would surely have a scrap piece of flooring to play with, if you don't have one.

That looks like the chip is in the transition piece and not the floor boards. For the best results, just replace the entire piece. It doesn't look like it matches exactly anyways, so just try to find something very close. If you know where the floors came from you might get really lucky and end up with the identical part.

It is either glued in place, friction fitted to a track or nailed (this can't determined from the pic). Either way, you need to carefuly pry it up, being careful not to damage the floor. Install the new one as-instructed or buy some construction adhesive and glue it back down and put a few phone books on it until it dries. Make sure to wipe up any excess glue with a damp rag before it dries. It was likely cut to fit so you will need to cut the new piece. If you don't have a saw to do this, take a measurement (measure twice, cut once!) with to where you are buying it and see if they will cut it for you.

The other methods you mentioned are suitable alternatives. If the color is matched well, it won't be very noticeable when standing. Crawling, maybe.