User blog comment:Kaido King of the Beasts/Chapter 770: All The Fights You Never Wanted to See/@comment-99.243.126.199-20141211211825/@comment-4164499-20141212203500

At what point was it established that Bellamys haki penetrated Luffys? Not sure if that lowest panel would suffice in making that a reasonable conclusion.

C'mon It's somewhat obvious that Luffy should have superior haki compared to Bellamy. Which leaves the question if he deliberately weakened his haki for Bellamys sake. But since it was used in a defensive way(theoretically it shouldn't hurt Bellamy since it was used to block his attack), then theres really no need for him to do that right?

My guess is that it didn't penetrate his haki.