I always allow the fondant to set up for a few hours before painting. The firmer, dryer surface is more receptive to paint. I agree with Zoe that dusts mixed with alcohol works much better than gel colors and with Charlotte to use a dark brown instead of black. When painting a scene like yours, I start with the lighter colors and build up to the dark….cautiously. I, too use a 00 brush, but Charlotte’s tip about the fingernail art brushes is brilliant!
Your painting is beautiful and your cake will be, too. Can’t wait to see it!
Sugar Sugar by SSmiley