Quote Originally Posted by docdan63
Easy. The difference is luffy can be cut up, and his skin doesn't come apart to deflect and stop everything, er, let things pass through like logia types. And he can't rebuild himself after attack. Technically, I can see where your argument would come in. But in the end its an ability to stretch. Otherwise that would be like saying that Robins hands can be built so much that she can be "made from hands". Which would be bullshit. In the end, logia is an elementally based fruit. Rubber is not an natural element. So stop trying to pass it off as one.
Crocodile can be cut as well, if he's wet. Enel can be cut as well, with a sharp, hard rubber knife, or glass (which, like rubber, is an insulator). Neither can "rebuild" themselves in that case. Indeed, both Enel and Crocodile bled after getting beaten by Luffy.

Luffy is SLIGHTLY weaker in that regard since any sharp object can cut him. But he is made of rubber, or else he couldn't do Second and Third Gear, which rely on his organs and bones being made of rubber.

Also, rubber trees. Though most rubbers are synthetic, there are many natural rubbers.