I had a go with the superglue on a larger crack (maybe 0.5mm across) and only just managed to get the drop to go in the crack on attempt no. 3. It clearly wasn't going to be worth trying to get it into the hairline lacquer cracks - as it was I got superglue over my hands and then managed to touch the inside of the guitar case, resulting in a very uncool hairy palm look.
I've attached a pic that shows a couple of cracks typical of those on the guitar.