Scale rot

[anza]

Hey, Im new to this site and forums in general, so spare me :')
Basically, my couple month old brazilian rainbow boa got mild scale rot and Im wondering how to fix it. Ive taken his old coconut husk substrate out for paper newspaper and removed moss that was in there, so I dont think he'll get it again but I need to figure out how to fix what he's currently got.
Unless Im wrong scale rot is bacterial, so I was thinking of spraying salt water on the scale rot spot or watered down veteritcyn, and instead of spraying maybe a bath?
The scale rot basically looks like a brown orange between his scales, and its on his side where the scales start to get lighter, I did look at the sticky on how to put in photos but I still cant really figure it out. I can email the photo if you'd like