darklord- ur mecha might turn into a "candy sweet loli pop" if it is colored by mee hahaha.
loki5- i use photoshop (smudge effect).
yuii-thankz- actually its hard to make the dark sky mix with the dusk colors (for me laa)
eek1- . :twisted: sorry dude if she is not your taste..
Most of us will do a perfect clean line art before we want to color our drawings.
i'm kinda lazy so what i did was leave the rough pencil sketches and then add the colors on it.
this is the rough sketch.

in the photoshop i start up with using gradient toolbar and choose darkblue(fg) and yellow(BG). Later on i use a lot of layers and then merge
it so that my pc wont have RAM problem.
If u make a lot of layers, it will slow down your pc performance.