There are plenty of self-healing polymeric coatings types. I attach an article about self-healing coatings for corrosion protection. Maybe it could be the starting point for you.

Dear All;

the question is so wide, it should be more specific for better answering. The following link  plus the two attached documents may be helpful. Regards

http://link.springer.com/chapter/10.1007%2F978-1-4020-6250-6_7#page-1

Although, there are many ways to prepare self healing polymers, in many ways one has to think for designing new kinds of binder/resin.  Instead you can find simple way for converting your existing coatings into self healing by addition of microcapsules holding self healing agent.  You can refer following links for the same.

http://pubs.acs.org/doi/abs/10.1021/ie301813a

http://pubs.acs.org/doi/abs/10.1021/ie401237s

http://pubs.acs.org/doi/abs/10.1021/ie402505s