1. Yes, for this purpose it is safe. That part of the skin is going to be in the healing and expellation mode, not absorption mode. So I wouldn't worry about any potential side-effects from it. I recommend that you start using the herbal past in small amounts, like a tiny (pinhead size) amount, just on the mole itself to minimize any major changes in skin color later after the healing has occurred. I would do no more than two places at a time, starting with the ones least visible, like on the back or tummy. This will give you some experience with doing it in other places. I am not sure if it is a good idea doing it on the eye-lid. Better to cleanse the kidneys instead (moles in the upper eye-lid relate to some congestion in the corresponding kidney).
2. The Ener-chi Art pictures for the kidneys and the endocrine system (ener-chi.com) may be useful to restore and maintain normal Chi-flow there.

Andreas