Most of the fancel sites online have info on how
to paint cels.

info on supplies:
http://www.niisan.com/eyegrey/

painting & supplies:
http://www.darksidemillenium.com/cels/celinstruction.html

there is also a who list of the fancel sites on
the main page of cels.org if you want to look and
see if they have more information.