@Ivotas:
The only "element" that exists in nature that is hot enough to vaporize everything can only be found in stars themselves, it´s lava or magma (however you want to call it).
I would have to disagree with the above statement. The most dense lava (on earth anyways) typically erupts at a temperature of around 1200 - 1500 degrees Centrigade. This is nowhere near the temperature output of the sun which is a controlled fusion reaction not simply the liquidization of rock. Our sun, has an estimated rough temperature of around 6000 degrees centrigade, making it one of the cooler stars. However some stars are postulated to exceed 30,000 degrees centrigade.
The temperatures are a result of the fusion of Hydrogen to Helium to produce heat and light. Inside the core of the Sun, heavy elements gather and dampen the fusion process, allowing a controlled reaction. In the fusion both compression and heat are needed in large quantities. Inside our Sun this is normal, due to intense gravitational compression and molecular movement near the core. Which I think that both heat and compression would be totally different Logia devil fruits.
However this is a moot point since there is a source of heat here on Earth that puts both the normal temperatures of our sun and magma to shame. Lightning, if you will…energy. The superheated ions in lightning form a naturally occuring plasma channel that exceeds temperatures of 30,000 Centigade.
Another note: for vaporization to occur a liquid or solid must completly change into a gaseous form. Lighnting itself doesn't last long enough to vaporize any appreciable amount of the struck object, and magma doesn't vaporize as much as undergo a slow phase change into liquid. Some metal obects will still retain their structure after being dunked in magma. However in the presence of a fusion/fission reaction the material will be broken apart atom by atom and dispersed. (which would be true vaporization)
So, basically Enel's power would vaporize, it's just that one Piece doesn't ascribe to the boundaries of science. Hell, Ace's power wouldn't make much sense unless he could somehow change the oxygen content of the air around him, otherwise the standard atmosphere is fairly inert. But hey, it's anime!