User blog comment:Traffy731/luffy's red hawk attack/@comment-142.222.95.22-20120924141723

Or his gear second his overdrive or something of that sort. His body isnt turned into fire like Ace. It is on fire. Maybe he cant use it unless he uses armanent to protect his body from said fire. He is rubber after all so setting him self on fire would be bad. The fact that he got this after he learned haki means he can protect himself against these elements.