I'm going to add to my post, as it was all about accutane & nothing of scarring....
I cannot stress how helpful it is to constantly exfoliate the skin. Yes, constantly. That means once a day, if you can handle it.
Don't scrub. Gently, yet thoroughly use an exfoliant that doesn't consist of a creamy substance (like Clinique's 7 Day Scrub) because that did make my skin worse. It is rich & will clogg your pores. I recommend Laura Mercier's Face Polish.
Now I've never liked the idea of applying oil to acne-prone skin. That was until I started using Trilogy's Rosehip Oil. - For a completely different reason, but I very quickly discovered how rosehip oil settles the inflammation & does in fact fade out scarring!!
Now on the box, it does actually claim to minimize the appearance of scars, among other things (fine lines & wrinkles, aging skin, damaged skin) & I can say, hand on heart, it does the whole shabang!
This oil doesn't clogg pores & cause acne at all like I thought it would, so I have complete confidence in using it.
I apply this always after thoroughly cleansing (Clinique's mild soap) & exfoliating with Laura Mercier's Face Polish - before bed. I apply it only in the evenings or whenever I'm not going out, during the day, because it is somewhat very oily & I wouldn't wear this under my makeup.
I seriously suggest giving this reutine a go. Give it a week (not that you'll need it/ results are shown by the end of the day).
I'd be interested in how it has worked for you, so please report back!