I used Adobe After Effects and at this stage I'd like to introduce my friend Renato Ferro (http://www.renatoferro.com) who taught me a lot of tricks and also gave me some ideas. At this stage I burned out my brain because I wasn't to familiar using After Effects, but in a good way I learned a lot! Exporting Z channel using scanline render I got the DOF lens effects using After. I colourized every object separated, at "2D" part of the animation, doing masks of every object in the scene. I got those masks applying a 100% of self-illumination at the material of the object I wanted to be masked and a matte shadow in the others. After that I had all objects separated like masks and the possibility to colorize everything separated. Twixtor plug-in was an excellent option to sync music/animation using Adobe After.
I hope you guys enjoy the "making of " and I hope you learned something. If you have questions just send me an e-mail. Thank's.