I've done a lot of baking, but never painted fondant. I need to for an upcoming cake. What do you use? Thanks!
I mix gel food color and vodka, then use baking paint brushes. The alcohol evaporates as it drys. You can also mix it with lemon juice instead of vodka, but I've heard that can have a sour aftertaste.
Here are some tips: http://acaketorememberva.blogspot.com/2013/05/tips-for-painting-on-cakes.html