Apparently stretch mark cream is good. Are you talking about the scarring or the scabbing stage?
If they're still scabbing a good antiseptic cream is a good idea. Maybe Sudocrem?
Also good diet is important, plenty of vitamin C, and not just the vitc powder you're using to mix up ya shots!
It's important to keep them clean and it's a good idea to get some sun on them to promote healing, which I know is the last thing you wanna do when you have bad track marks!