Share 'Decorating With Royal Icing'

Hi Everyone, I was wondering if it is possible to decorate chocolates with royal icing or will the royal icing do something to the chocolate. The reason I ask is because I cannot afford a bag of white chocolate at the moment and I need to do some decorations in white for Christmas. I have lots of cocoa butter though and maybe I can color it white somehow and use that. Does anyone have any ideas f…