I've made several wedding cakes, but still consider myself a newbie... recently I have been asked if I can create a smooth-surface four tier square wedding cake with some of the pearl dust on the cake. She requested silk stargazer lilies that she will provide (to match her bouquets) in a cascade over the finished white. I have never worked with the stuff that shimmers except on the few times I've made cakes with fondant. I would greatly appreciate some guidance and tips!!

I would use an airbrush and use pearl on it

You can just airbrush some pearl shimmer on the cake really easily!!!

If you do not have an airbrush, they make an aerosol can of the pearl, but I suggest practicing first because it can go on quite heavy and is harder to control.

I don't currently have an airbrush, so I may try the aerosol type. I was thinking I'd have to brush it on, so this sounds MUCH better to me! Buttercream is too "sensitive" for my amateur hands to try to keep from denting or gouging with a brush-on-finish, and aerosol sounds like it would go on more uniformly, too. I'll let you know!
Thanks, and Keep sending the tips, they are AWESOME!

Just yesterday I applied pearl shimmerdust to a white bc cake and it turned out great! I used Sharon's bc, and gave it a good half hour to crust...I then used a very fluffy brush (actually a Bare Minerals brush that is solely used for cakes) and then VERY lightly steamed it...It was gorgeous, looked light moonlight on new-fallen snow
HTH
Cathy