I used these acrylic paints watered down with a little bit of Windex (neutral grey & burnt umber). Starting with grey, I dabbed all over, let dry for a minute or so, then dabbed the majority off. Let that dry, and repeated with the umber. If it gets too dry and difficult to remove, just spray Windex on your napkin or armor (mist from about 2” away) and it loosens back up. Sent from my iPhone using Tapatalk