Now that you have your cleaned up image, it's time to get to work. What you need to do now is select an area to color. Just pick one (hair, skin, background, etc.), it doesn't really matter what order you do it in, you will get to everything eventually. For the purposes of this tutorial, I'll start with the skin. Using whatever selection tool you desire (I personally just use the polygonal lasso) select all of the skin in the image, making sure you subtract things like the eyes and mouth. If you have a Tablet this step is probably much quicker. Get it close, but don't worry about getting it exactly exact, we will take care of the rough edges in a second.Your selection will look something like this (over the whole body of course):Now go into quickmask mode by hitting the circle-in-a-shaded-square icon in your toolbox (or just hit q). This will turn anything that you didn't select pink, and your brush palette will turn to white and black. Now you can edit it just like any regular mask (white brushing reveals, black takes away). The first thing to do is get rid of the rough edges by applying a Gaussian blur to the quickmask (usually around 5 pixels, but play around). You might want to apply some selective gaussian blurring to areas where the skin mixes with another element such as hair, to give it more of a fade instead of a harsh line. Then go around with your brush tool fixing any overlaps (the only thing that should not be pink is the skin).It should look like this:Hit q again and it will become a selection again (but smoother and with some feathering). You can choose to just select the entire thing in quickmask mode, but I find it faster to do it this way. It's a good idea to save this selection as a channel, in case you need it for something later. Leave the selection up.Now for the coloring...