Hi Uncle Pockets,
I was on prednisone for about 5 years on and off and I did have pretty bad acne. It took about a year for my system to get back to normal after going off it. If you go to a dermatologist they can give you topical solutions to help deal with the acne while your body is getting back to normal. It might be faster than a year for you because you were on the prednisone a shorter time. I also found that when I ate better (no sugar and junk food) the acne was better also.
I read a book by Dr. Perricone "The Acne Prescription" and he has a diet in there that is very good and decreases inflamation in the body and it helps acne. I also found that his diet also helps keep my Crohn's in remission.
KangaRoe