So these aren't as polished-looking as I'd like, but much better than the machine sewn gloves. By far.
I think that has to do mostly with having a better pattern. I took apart some vintage gloves that I loved and wore to death and made a pattern. That way, the pattern already had all my finger... quirks molded in. Except for the quirk that my palms are a size medium and my fingers are an extra 1/2 inch longer. Or, as I found out after making them, my thumbs and pinkies are only 1/2" longer, my other fingers are 5/8" longer. Geez.
I also left the fourchettes in a "V" shape because I didn't think the grain of the stretchy fabric would make that much of a difference (It would if it was really stripey, but the bias in between the fingers might also look pretty cool.) The original fourchettes were stitched into a V after construction, which in hindsight, would make them easier to stitch.
I managed to salvage a goodly length of the original thread used to sew the gloves. It appeared to be either cotton or silk, although since "100% cotton" was written/stamped on the inside of the gloves, I'm assuming it's cotton. And no, I'm not going to light anything on fire, thank you. (Which reminds me, I need to check and make sure my fire extinguisher is still pressurized.) The original gloves were sewn with a double length of thread.
At the fabric store, I chose two threads that appeared to have the same kind of twist as the original, and one to match and one lighter weight. I sewed the left-hand glove with the perle cotton, which was a bit too much of a pull to get it through the thinner fabric. The right-hand glove got the Sulky Cotton treatment, and it was much easier to pull the threads through.
My next project will be to try these with actual heavy-weight ponte knit and see if the edges look more finished and less ravely.
Do any of you know a source for 100% ponte knit? My google-fu turned up nothing - the places that say they have 100% cotton ponte in the search results, don't.