I would brush it before just to make it easier on yourself for getting in all the nooks and crannies, I would also mix it with some clear vanilla extract or some other alcohol and apply it, all depends on the look you're going for.....I find that brushing it on dry works well too but you use a ton of it! I always brush it on dry on chocolate but with fondant I usually airbrush it on or paint it on with extract mixed in.
Do you paint these on like you do luster dusts? What is their coverage like? I've never heard of them, although I use the dusts all the time. Sounds like something Imight want to try - thanks for the heads up 
I usually paint the loops before I assemble the bows if I'm wet painting. If I'm dry painting, then I do it after assembly. It all depends on how much lead time I have to do the bow.
I just started using luster dust but the one bow I used it on I painted it on dry before I assembled and I then just had to touch up a few spots once it was assembled. It gave a nice effect though doing it dry.
There are three new products from BakeryCrafts--pearl glaze, silve glaze and gold glaze. The come premixed and are pretty easy to use and from my experience give great results.
I happened across them recently online. Don't you need a license number to order from Baker Crafts?
I just finished putting it on my bow !!!!LOVE IT!!! I mixed it with the clear vanilla and brushed it on. Next question, to put it on the rest of my fondant design , do I attach the decoration to the fondant, then brush it on after its on the cake? Just curious because the bow got a little sticky after I put the dust on.
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