I used THIS homemade fondant recipe for all the colors except the black and red, trying to tint those colors makes the fondant gooey so I use the Duff brand. I covered each side with a square of black instead of trying to cove the whole (huge) cake at one time. Keeping the cake cool is KEY. Once it gets too warm it will start to get indentations from the pressure of smoothing fondant over and over.
a little faith and a lot of frosting