Thanks for the compliment ! I use Photoshop CS3. I place my drawing under the layers with "product" selected like this: image.noelshack.com/fichiers/2… Then, I create a new layer and I put it on "color". I let my brush on "normal" setting: image.noelshack.com/fichiers/2… I take a color sample of the original photo of the area that I want to color with the eyedropper tool. I hope it helps, sorry for the late reply..
Thank you! That said, I had to add some improvements to the original drawing. Some areas have been painted over the pencil, others simply colored. This is the case for the helmet and for very white Areas, which remained gray with color. So I would say that's more a painting that a simple color. (Batman is only colored)