Toning up after WLS

I have lost 45 of the 80 pounds I would like to lose.  I have always been somewhat active--going to the gym 4-5 days a week, doing both cardio and weights.  I am blessed with toned legs, but the arms are starting to continue to wave after I stop!!  And while the belly isn't too bad, it could use some help as well. I  I  by no means think I will need surgery for the excess skin. I would like to tone up with exercise. 

Wondering what advise anyone may have to accomplish this.  Have you been successful in toning and tightening up just through exercise?  If so, what kinds?  If not, what did you do?

Thanks in advance!

Shannon