Was everyone else aware of this and I am just late to the party? I came across this trick a couple of weeks back. When mixed is sets like instantly / strong like concrete and sticks like sh-t to blankets. I have been fixing ceramics, plastics and some cheap metal parts which have been bugging me. It files down easily, you can paint on it and it seems hard / durable enough. If the object is white it blends in anyway. I don't see myself using it much on the watch front but for general DIY is has worked wonders on small parts and chips/cracks etc....
It's like an expensive version of bog and putty you use for car panels. Sets hard, lightweight and can be sanded down easily.
I am a newbie on this but so far so good. My gut feel based on how it looks / when I file it down is yes. Maybe if the material was flexing too much in use it might drop out. Also I have only used it on small jobs plus I tend to put a good amount of glue on first and then sprinkle the soda on. You can build layers that way. I think in the video he added the glue as stage 2. I would try it on a test item first / see what works for you.
I've used talcum powder mixed with automotive touch up paint to fill in gravel nicks on a car. This super glue method looks to be pretty useful.