I know this is in the BP section but I wanted to post a pic of some of my corn's scars from when he got scale rot. I figure it must be pretty common for people to adopt snakes who have scars from past scale rot, so this may be helpful.

The white spots are missing scales that will fill in eventually; you can see a dark area between his second and third "motley circle" which is where a patch of scale rot used to be.