I colored my gray fondant last night and left it covered on the kitchen counter. It has turned green this morning. I have found out that it is because it was exposed to sunlight. Is there a way to color it back gray?
You can try adding a bit more black color to a *very small* (golf ball size) piece to see if it is o.k. then add that to the rest.
If you have an airbrush use the airbrush coloring for this.