Hey I take in a lot of rescues myself and have seen very dehydrated snakes in the past. Soaking before a shed often generates a patchy one so that in itself is not a mager concern. HOWEVER I would assume that they are dehydrated and take some steps. Do you feed FT? If you do I do this and it works well Take a well thawed rat and a syringe and add as much water down the throat of the rat as you can get to stay in. (it can be messy) than feed it This returns some of the water loos due to freezing and can add a little extra as well. There is no direct science that says soaking will help re-hydrate a snake but it is worth the effort if the animal is reasonably accustom to handling. If soaking stresses the animal greatly I'd stop. try 84-87º water for 20 min I like to use a wide low tray (no deeper than 1/2 way up the sides) and cover it with a dry towel to keep it dark. (don't let the towel get wet (ok very wet)

Folded scales are not uncommon I believe they are from a small hide and tight coils the scales sometimes fold.