Today, I have seen a lighthouse and a teapot molded using RKT. Both were covered with fondant. How do you get the RKT's smooth enough to put the fondant on it so that it does not have a lumpy bumpy look to it? Do you put on a thick layer of butter cream icing first on the RKT's before you put on the fondant, or do you put on extra thick fondant so the lumps and bumps of the RKT does not show through? When trying to make a teapot shape out of RKT, do you mold the RKT in a ball pan to get a perfect curvature? It seems to me that trying to make a ball shaped teapot without a mold using RKT's, would be very hard to do and it would not look perfectly round.
Any time I have done anything with RKT's I have applied a thick enough layer of Buttercream over it to create a smooth surface for the fondant to go over. HTH
cakewhiz, here you go, hope this can help you.