I just watched the CC video on painting buttercream (www.cakecentral.com/tutorial/61710/painted-buttercream-cake)
In the video, the decorator uses merengue buttercream. I'm wondering if it's possible to do this on any crusting recipe or if it has to be merengue...
You can. Just us a light touch and make sure your buttercream is completely set or the brush will leave dents. It is really fun to do!