Since I had been working on my costume at a friend's house, the pieces were all at her place and inhibited my ability to do random bouts of work. I had to wait until going over to place before I could do anything; no more "I've got ten minutes to spare, I'll fix X or Y." This turned out okay because my friend is an awesome lady and she would go, "I'm bored. I'm going to add shinies and make this costume even more awesome without telling anyone." Then I'd come over and find components all complete for me and it was amazing. The only down side to this is I don't fully remember what happened, nor do I have pictures of the entire process anymore.
The aforelinked gloves I pinned and cut were sewn together for me one day. That's pretty standard, though. That meant that with my lovely white manicure (fake nails are bizarre), I could basically ignore my fingers for the purpose of Halloween. I didn't want to paint them and I didn't want gloves; too hot, too much restriction on tactile abilities. I made honest attempts at this method of skintight gloves before giving up and admitting that the night before Halloween was not a good time to try and solve this issue.
Once my horns dried, I spent a few days doing spray paint layers of flat white on them. Spray paint is fun, but a lengthy process. Lots of thin layers to keep it from drying all goopy everywhere, but in the end, it worked out dandy.
I bought some very light grey-ish blue paint to do detail work and high/lowlights on the horns ... then I realized that I'm miserable with paint. After vacillating for who knows how long on what to do, I ended up fingerpainting acrylic with water. That's an interesting experience. I used a lightly damp sponge to get the horns every so slightly wet, had a little plate with water on it, squeezed out some of my paint, and used my fingers to smear it over the entire horn. I let the water disperse unevenly and it grooved itself around on the mache. I'll say now that the horns were the most difficult part for me to figure out how to handle and will definitely be improved upon in the future.
The lighting doesn't show too well, but with the grey smudged around, the horns didn't actually look too bad.
I used a very thin headband that wraps all the way around the head -- the elastic kind. But the part that stretches over the actual head is rubbery, with teeth. It stays in very well. Unfortunately, the band is very thin and the horns wobble a bit when on. I then took a regular, thicker, solid plastic headband and attached it behind the thin flexible one, and to the horns as well. This added stability and worked well. (My original plan was just to use the wider band, but on top of the wig, it wouldn't sit properly; the wraparound band helped hold it down and in place.)
I used a scrap from the children's leggings (purple!) to cover the bands and make them look pretty. I used some of the shinies I bought to decorate, and called it good. Also, guess I should mention that I did this the morning of Halloween. After my shower, before putting on makeup, I decided to add the second headband (formerly was using only the thin one and letting the horns wobble; moved real slow, elegant, and gradually to compensate) and cover and bling. I regret nothing.
For my face tentacles, I did an on-the-fly sort of thing. I folded my fabric in long halves, letting me cut about ten inches in length out of them. Pinned them together, and just trimmed a very slender strip. Times four.
Using the gold ribbon I trimmed my pant legs with, I made little loops and glued them on the tentacles. Once dressed, the tentacles were pinned in to my natural hair. My wig covered them and held them in place, giving the illusion that they came from close behind my ears.
Another piece my friend completed for me involved painting my tail rings gold. The same ribbon was also wrapped around the outside of the rings to tie it all together with subtle detail. I enjoyed it.
She helped me glue details on my boots and belt, and it was good to go! All in time, too!