I never had to add anything to my black SI fondant. It does seem kinda moist. I mean you have to be careful but it seemed like if the blob of fondant got exposed to air it would be less moist and I could handle it. But I mean you don't want it dry either--but that's my tip that works for me. Let it air dry a bit. A careful bit.
Yeh...it does seem a bit moister than regular fondant... I use pam reg spray to put a thin coat on my counter to work the fondant and to roll....you don't have the white streeks from p.sugar. it is a bit tricky to work with, but go slow don't roll to thin and you should be fine. please post a picture.....
I never had to add anything to my black SI fondant. It does seem kinda moist. I mean you have to be careful but it seemed like if the blob of fondant got exposed to air it would be less moist and I could handle it. But I mean you don't want it dry either--but that's my tip that works for me. Let it air dry a bit. A careful bit.
What K8 said ^^^
ohhh and if you use a silicon mat and silicon rolling pin you won't ever have to use PS or anything else to roll any fondant out... whether black - red or white.
That way you won't ever get little powdery/crisco marks on your coloured fondants.... 
Bluehue
I am going to be working with black fondant this weekend and will be applying white fondant decorations on top of it. Will the black bleed into the white?
Best tip...
Allow your black to firm up a bit - then apply your white decorations.
I gave my black cake about an hour - before i added the white.
http://cakecentral.com/modules.php?name=gallery&file=displayimage&pid=1862736
Bluehue
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