I've used disco dust on fondant before by making an edible glue. Do I need to use the edible glue to have disco dust stick to buttercream or do I just sprinkle it on?

I just sprinkle it on. It sticks very well!

Thanks.

Yep, buttercream is a better medium than fondant for DD as it sticks with no extra prep needed!

Good to know. Thanks.
I met with someone last night who wants her cake to have DD on it and then scroll work piped over it. I'm just wondering if the scroll work will stick now to the disco dust.

I guess I need to use that extra buttercream I have and do a quick practice on a dummy cake to see.

I wonder if you used a scroll press, or somehow imprinted where your scrollwork will be first. I think I'd be a little concerned with the scrollwork not staying put if you applied it over the disco dusted buttercream. It would depend on how much dd you used too......

you can also use an air brush with high grain Alcohol