I was planning on putting together some suggestions for healing the actual Acne AND letting you know what I've done with the scars.
The scars I've removed from my own self are not shallow/surface scars. They're the results of large boils & carbuncles (some of which were 'alive' for years); the majority of the scars were extremely deep and nasty - some with pits several millimeters across; the scar tissue was dense/heavy and very thick.
Like one other poster mentioned, it takes dedicated effort daily, but with those I have attempted to remove, I have removed all of the scar tissue (a couple were so deep that the pits are not completely gone, but either will be - or are so greatly diminished that they're not longer of a concern to me.
It may take me now until sometime Thursday to get the information/links together and posted - I've run into a couple of semi-emergency situations with my family/mother situation that must be dealt with first.