*sorry for the late response, I forgot about this topic =X*
Beelzebub: The grays here need a bit of work, they have a weird pattern in them. You left some spots when burning the letter H. Remove that border at the right side.
BD: Same as last time. Be careful with the burn tool on speedlines (like in the sfx). Grays can be flatter.
DGM: The grays are too flat, you lose details this way. The grays on this page are really crazy ~_~ The gutter shadow is still visible inside the panel. Tutorial for this is here:
http://www.unblessed.net/guide/cleaning/gutter.htmlDD: Not bad, just remove some dusts on the whites. (2nd panel, kucabara's hair)
FT: Grays can be flatter and you forgot to rotate the page. Also burn the borders.
Naruto: Not bad, just make sure all the blacks are black. (last panel especially)
Reborn: Make sure all the blacks are black, like hibari's box weapon. The page split is still visible, clone it out. Remove the dusts on the whites, like the bottom right corner and remove that border on the right. Good job on the grays and levels.
This might help you a bit:
http://ieatsoul.com/training-ground/common-cleaning-mistakes/Good luck next at your next try ;