Sorry, no miracle cures here. Just a few methods of things that have helped me with picking, on and off. I definitely still struggle with it daily and have not been totally successful, but when I have periods of remission, this is what has helped:
What has helped me recently is to just strip down naked and look in the mirror. Really force myself to see what I've done. I never look at the big picture when I'm picking, just individual areas, and I become so wrapped up in it and just zone out. When I force myself to look at things at a macro level, to really just stare at my body and how I'm just ruining something so otherwise perfect, it gives me new motivation to stop. I have hope that I can be beautiful again and maybe almost back to normal.
Also bubble wrap helps when I get the urge to pick. It's a similar satisfying feeling of being able to pick/pop something, but it isn't harmful. It also keeps my hands occupied and distracted. I keep bubble wrap in my house in bulk, and always take some small sheets with me in my purse so I always have it.
As far as scars, I have noticed that the oldest ones have faded away to almost nothing. Cocoa butter helps, I use Palmer's nightly. I also take vitamin E tablets for skin renewal. I also eat lots of foods that promote white blood cell production and cell turnover to renew skin and prevent infection: bananas, yogurt, garlic, squash, carrots, sweet potatoes, mushrooms, salmon, cranberries, and also I take vitamin supplements, making sure to get zinc and fish oil.
I really hope this helps...we are all in this together. We can beat it!!!