Acne marks do go away, but they take their respective time to do it, let’s say it can take anywhere between 3-6 months. However, you can follow up with certain acne facial treatments to speed up this process. On the other hand, the simplest home-based solution is to take 2 teaspoons of baking soda and make a thin paste by adding water. Now apply the mixture on your acne scars or marks and leave it there for a few minutes. You will need to do it daily for several weeks before you start seeing visible results.