Well, I used the Super White Merckens candy clay in the Pettinice fondant according to Jennifer Dontz's recipe and even though I over stirred it and created panic in myself after it oozed and sat in a milky puddle - it rested overnight and after kneading it again it was fine. It worked GREAT in the recipe - no tears or stretching at all. It also tasted fantastic, my daughter has been "snacking" on the leftovers!
I was so relieved and happy and will never overwork the candy clay again Whew!
Thank you Jennifer for helping me throughout the whole process and your fast responses!

For background, please see:

http://cakecentral.com/cake-decorating-ftopicp-6765950.html#6765950

HTH