I love using the Ross Paste and have never had any trouble with it sticking.
I mix it up with a wire whisk in a plastic pitcher and it stays FOREVER with
no smell (a bonus!).
I especially like using it for mask making over plastic mask forms. I can
use my X-Acto to cut out eye holes or mouths for students who want them. I used
to use pariscraft and we all know how hard it is cut that stuff!