(Note: Shi Shi-O convinced me to make this topic here because he likes it so much. This is my first topic at this forum btw.)
Will this make him powerful enough to defeat Magellpwn? Or will he only be able to hold his own against him but not defeat him (stalemate)? Will the powerup be like Nightmare Luffy or will Luffy use it like gears?
I believe it will merely make the fight end in a stalemate (I believe Ace and Jimbei will be the ones to truly defeat Magellpwn). I believe the vulcanization might actually be permanent if it happens, but Luffy will retain his stretchiness, this is OP so Oda has liberty when it comes to physics. Just like he exaggerated rubber's resistance to electricity during the Enel fight. I could also see Luffy learning to use it like a gear. Either way, I don't think it will be a mere one time powerup.