>All the gengas I've seen like this look 
>photocopied(?). The black lines look photocopied 
>at least - the colored lines are all actually 
>colored on the paper but usually seem to be 
>scribbles or marking one particular area. Why are 
>these like this? (Why photocopy a hand drawn 
>picture instead of using the picture itself?) 
>What is the point of the scribbled color?

I actually only have two genga (while drooling 
over all the Kenshin gengas on Taro), both of 
which are real pencil and colored pencil. Never 
heard of whiteout on a genga (!), but I'm not 
entirely familiar with the production process from 
genga/timesheet to finished cel ...

Actually, I'm not sure of the visual difference 
between a genga and timesheet, either.. I suspect 
scribbled color is shading, though.