You can see my previous comparison here, and find some links to tutorials, too, if you're new to this technique.
And then some colour.
pointer: sanitizer mix
ring: Giorgi hairspray
pinky: Nelly hairspray
Colette also found out a similar mix did it for her - so I'm in a good company :) I will continue using the Nelly hairspray, too, for the larger spots look (and because it's a lousy hairspray, LOL).
I hope this was useful to some of you. And please share your experiments and experiences!