Only a few specific people are able to release elements across their entire body to form Chakra modes of that nature. Examples being the Raikage and Kakuzu. The 3rd and 4th Raikage were able to pass Lightning Release across their entire bodies while Kakuzu could do the same with earth style.
What I'm trying to understand is why the Lightning release that the 3rd and 4th Raikage used never seemed to affect or harm them in any way. I'm asking this because During Sasuke vs Deidra, Sasuke did Lightning Release on his entire body and he took a lot of damage. But on the other hand, the 4th and 5th Raikage's could do this without any problems from coming in contact with the lightning.
Is there some kinda explanation as to why that is? I'm thinking that those 2 probably had a lot of immunity to lightning, but nothing like that has ever been mentioned before.
PS: All forms of Kekkai Genkai and Jinchuuriki are excluded from this conversation