Hello,
Do you think it's possible to luster royal icing??
I have to make a wedding cake with fondant and i luster all the cake but i m going to ad some white arabesc on the top of each cake so do you have so advice for luster the arabesc ???
Thank you for your help
Doudoun 
I hope I understand what you're asking: you want to put luster dust on royal icing?
I made a cake with royal icing decoration. When the royal was dry, I painted it with a mixture of luster dust and lemon extract (you can also use vodka). It worked very nicely. If you want to see it, it's the wedding cake in my photos with the pearls. The floral design on the sides was painted with luster dust.
You can also brush it dry on the royal, but it wouldn't be as shiny.
Good luck!
I have dusted dried royal icing flowers with non-toxic chalks, but I will try the luster dusts next. Thanks for the tip!!!
I don't know the exact amounts of each thing--you just make a thin paint. Sorry I can't be more specific.
Lemon juice will not work. It's the alcohol in the lemon extract that makes it work. The alchohol evaporates when you paint so it dries quickly and that keeps the royal icing (or fondant or whatever you are painting) from getting soggy. You can use any clear alcohol--vodka or clear vanilla would work. Regular brown vanilla would alter the color of the luster dust, I think.
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