Here are some links to do with luster dust on buttercream=) And yes you can use it! The links give advice on how to=) HTH some, Jen
http://forum.cakecentral.com/luster-dust-on-buttercream-ftopicp-1612991.html#1612991
http://forum.cakecentral.com/luster-dust-on-buttercream-ftopicp-972981.html#972981
http://forum.cakecentral.com/luster-dust-on-buttercream-ftopicp-548601.html#548601
And if you click this link, you can find even more discussions by clicking the view all under the forums part...
http://www.cakecentral.com/modules.php?name=Search&q=luster+dust+on+buttercream
I did it a couple of weeks ago for a bridal shower cake. I used a very soft paint brush and brushed it on the edge of the dried buttercream rose. It worked out very well.
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