The Rustic Tart posted:
Hello Julia! Thank you very much for the reply! That could be it. In my original post I mentioned that I used meringue powder just in case the royal icing base could be the issue. I never thought about the surface being too slick but I think you may be right. I usually air dry my cookies however recently after seeing your videos I started using a barely warm oven to dehydrate them a little. To be perfectly honest I'm not 100% sure if I have only painted on oven dried cookies, I don't think so but I will certainly keep it in mind when I'm experimenting. I also have an airbrush although I haven't fired it up for the first time yet, it will be interesting to see how well it works.
When you have had the airbrush coloring bead up on cookies how did you trouble shoot it?
I was careful not to spray too heavily and to apply coloring gradually, but I prefer to use air-dried cookies when airbrushing.