Ok I've been trying to figure this out for ages and none of my other cake decorator friends seem to know for sure.

What do you use to paint faces on your little gumpaste figures? More specifically what would you use for the whites of the character's eyes (sclera)?

I feel like I could do a pretty good job @ painting little faces on my gum paste characters I just don't know what to use?

Or if I just give up the "everything must be edible" trip then what sorts of non-toxic paints should I look into?

This is what I'm talking about.
http://www.dragonflydoces.com/pasta-infantis/infantis-princesas3.jpg

You can use white food coloring: http://www.globalsugarart.com/search.php?search=americolor+white&searchimage.x=27&searchimage.y=13

This is what I use for the white dot in the eyes, it will also work for what you've described...you can use it straight out of the bottle with a small brush.

airbrush paints are awesome to paint on gumpaste, fondant etc.. just grab a paint brush and have it.

Thanx so much, this helps a lot.

Maybe the bright white sold here in Canada sucks, but I am finding that white painted on black, makes pink! (Caution)