I'm making gold coins out of fondant for a treasure chest cake. I'm planning on painting them with gold Luster Dust, but I've never used gold before. I want them really shiny, so should I color the fondant a color (yellow?) or can I use just white fondant?
I have done it both ways. I found the trick to make it shiny is to use the dust with a little vodka or everclear.
I've done it both ways, too. I think I like starting with colored fondant. Actually, if you have AmeriColor Ivory gel/paste, that turns the fondant a nice, rich gold, too. It's a great starting point for coins.
When you paint them, if you mix the gold luster dust with lemon extract, the color will hold better once dry and won't come off on your hand or other cake parts as easily as if you use straight alcohol (the lemon oil holds the dust in place better). It smells nice & doesn't really impart a detectable flavor.
In my experience with shiny (check out the rim around my banjo cake) I started with americolor gold colored / gp or fondant.. then I painted with a mixture of gold/pearl dust with everclear..