Hi Kinkyoto,
It doesn't look like fungus to me. It looks like it may just be skin shedding - this tends to be more noticeable for wildtypes and melanoids due to their dark skin tones.
Is he eating okay, and acting normally?
How long have the white marks been present?
I would keep an eye on him, and wait a day or two before considering saltbaths (the unnecessary use of salt baths can cause a great deal of stress and cause more harm than good).
Please keep us posted (comparison photos from one day to the next day may be of help, too).