Hello again!

I'm wondering if anyone knows of a good salve/lotion/magic potion for sensitive canine skin? Tango is a very small (6lb) Chihuahua and he has thin sensitive skin. His scar has had a couple of months to heal so it shouldn't be quite as pink as it is (I think?) Is there anything I can apply to his scar area to keep is from chafing in the cold weather? He is very small and his hair is still growing back on this front right chest quarter so he has to wear a coat outside at night. I'm wondering if the coat is the cause of the chafing? It is fleece lined so I'm a little perplexed! He also has small calluses on the back of his knees which I think is because he likes to spend a lot of time in what I call his "meerkat" pose where he sits/stands on this back legs to get a better look at things.

Any advice would be much appreciated!