Re: I am a Makeup Artist - How can i be of help? 
To conceal pigmentation marks, you can use a corrector concealer. try using an orange coloured concealer (try MAC, they sell on in their studio finish range). On my clients who have pigmentation on their skin, I use the orange concealer first. using a finger to dab on the colour and blend it. dont be alarmed by the brightness of this orange colour, obviously by itself it will look strange, You must then use a foundation on top to get an even coverage. other than that kryolan also do a tv stick in orange tone which can also be used for concealing the pigmentation marks. let me know how you get on.