I like both JB products, but the original seems to set harder.
It does run and droop....very very slowly. The clay isn't a bad idea. Plastic wrap works if you can keep it from getting bunched and caught in cured folds. Wet fingers allow some fingertip manipulation without it sticking to you much. Masking tape works sometimes, but Ive had some brands stick too.
The best sticking epoxy for me was radio shacks, but it had a slightly rubbery set too.
