Actually I might reconsider my answer, I remembered that he mostly wears a long coat and gloves. If he can create an arm out of fire, in perfect shape, he could put his glove over his fire hand. Since Logia users can turn their clothes into the respective element and then back into normal clothes, that should work out in a way so that his clothes don't burn up. But he still couldn't give handshakes :(
So maybe it'll be Fire Fist Sabo, y'know,
literally speaking
GOOOOODA