Securing lightweight pieces

I'd like to apply varnish on approximately 100 boardgame tokens. Most of them are rather small and therefore lightweight. They are made out of paper (hence the desire to reinforce them with varnish) so that makes them vulnerable to anything sticky.

How would I go about securing them so my airbrush doesn't give them flying lessons?

I've tried putty but that is still too strong and leaves residue and I'm worried it'll also damage the paper.