Reply Piping Royal on Buttercream?

Maria @ RooneyGirl BakeShop ...

Thank you all for the advise! I worked out another design with my bride and we are going to use stencils on buttercream and I’m going to stencil with gold dust. I didn’t think this was possible in a swiss buttercream but I saw SweetPea Bakery do it and tried it out and it worked great. I’ll share the cake in a few weeeks when the wedding takes place.
Thanks again!