Be careful not to overdo the teeth whitening thing.
Got one time I overdid it and the subject looked like the "Darlie" man, the teeth became too glaring and unnatural.
in all this desaturation and colour replacement, do remember to take into account the white balance of the image...it looks really odd when the teeth are pure white but the white shirt the person is wearing is slightly warm in tone :nono:
it is also necessary to sometimes increase the contrast of the teeth after removing yellow cause sometimes the desaturation causes the teeth to look less contrasty...
also, make sure to look at the persons eyewhites...
hm... usually I just pick a colour off the existing tooth's highlight and brush away... if done properly you can use this method to remove braces, gaps etc etc.. basically become a digital dentist..
yah , this is faster .. and after u select the tool. right click on the pic to bring out the brush size and bring it down to abt 15.. "depending on the pic size"..
next press Z to Zoom in to the teeth and start ur magic