White on Mexican Black Kingsnake

I just recently got a baby MBK who has quite a few white spots on him, mostly on his sides near his scutes and on his scutes of his neck area. I thought the white goes away as they grow older, but a friend told me that this happens more when it's on the dorsal side of the snake, but stays when on the scutes. Has anyone had a baby MBK with white on their scutes that eventually disappeared with age? If so, how long did it take? Or do they tend to stay when they are on those scales? I also heard that MBKs with speckling produce offspring with even more of it?