Beata! That looks SO great! You have really outdone yourself!! Yeah, modeling chocolate is my favorite. I am not familiar with rainbow dust, but I have found that you can paint it just like you would fondant. The banjo cake I submitted today was modeling chocolate painted with silver luster dust. I just mix mine with pure grain alcohol (190 proof), and paint it on. MC airbrushes fine too. Roll out a small piece of MC and snip some scales in it and try your rainbow dust on it. This cake is going to be AMAZING!
Jenniffer White, Cup a Dee Cakes - http://cupadeecakes.blogspot.com
