Can you use Modeling Paste with cake icing tips? Why not, we thought, and gave it a try. First we primed the canvas in a cheerful colour and let it dry. Then we sketched a cake on it. Next, we got out a disposable piping bag, mounted a metal piping tip and filled the bag with Modeling Paste. Then the fun began - piping on the cake! Try different tips, perhaps a slightly thinner one for outlines and small details, and a more distinct tip for roses, for example. Allow glimpses of the background to peek through while you pipe. Then let everything dry on a flat surface.