In my opinion, there is no better solution than using manuka honey in tandem with skin brightening products, to cure acne. Most of the times, a natural skin brightening products are sufficient to cure acne. Learn more about it here.
I would suggest you to do do 180-degree twisting dumbbell bench press, close grip weighted punch-up, cable cross-over, kettlebell flye. This exercises are enough to do have a good chest.