I agree with Mardie. Using a mug you have is a great idea, and RKT works great to form shapes. I made a teacup and saucer out of gumpaste by coating the inside of a teacup with a ton of vegetable shortening and then pressed the gumpaste into the cup. I hollowed it out by just pressing it into the bottom and then up the sides to the top. I left the gumpaste on the bottom of the cup a bit thicker, thought it might give it some weight (and if it was going to stick at all, something I could try to grab onto to get it out). I let it set-up for awhile (I’m not sure how long exactly) and when it felt like it wouldn’t fall apart if I removed it, I then took it out and let it dry. For the saucer I used the largest circle cutter I had and then placed it on top of a real saucer (with a bit of cornstarch sprinkled onto it). Once it had dried out pretty well, I removed it and let it finish drying. The only thing is that if you wanted to paint on the teacup, you would want to try to get as much of the shortening off first. To make your life even easier, you could just press the gumpaste/fondant into the cup like you would with the RKT, not worrying about it being hollow. It will just take longer to dry out.
I hope that helps, if you have any questions, send me a message. Maybe I’ll try making a tutorial for it one day. eek
good luck, you’ll have to let us know how it goes.
Nicole --- http://www.facebook.com/thecakeofit
