User blog comment:AYET/About imbued Busoshoku Haki/@comment-3986064-20121102132733

Not only arrows, weapons and your own body can apparently be imbued with BH. It's most likely that even air, even water, anything can be imbued with it. That's most likely what WB actually did when he almost flipped Marineford over. BH gives you the ability to grab onto anything is what I speculate and this is a pretty good evidence pointing towards that.

So I'm absolutely positive that a slash with haki cut Monet