In the Skypia arc, we see that Enel/Eneru doesn't retain his logia intangibility when Luffy hits him. The reason is later explained because he is rubber. I was ok with that until I saw this:
We see that Kamakiri is using a wooden spear, which is thrust into Enel's head. I googled it and learned that wood is a poor conductor of electricity like rubber. Therefore, as the iron end of the spear is stabbed in he should be intagible, but when the wood enters there his real body should be harmed. Therefore, Enel should be dead.
If there is something I am missing please tell me.