Can you pipe royal icing decorations on IMBC? (I was wondering if the butter would break it down) I can't seem to get my IMBC stiff enough for detailed piping and was thinking of doing either american buttercream or royal icing. It has to stand out for many hours at a wedding
Would love any ideas!

No - RI breaks down.

No, the RI will break down due to the butter in the IMBC. You don't have to have IMBC to be stiff in order to pipe and decorate with it. See my photos.

This is for a very detailed piping and the IMBC doesnt seem to hold the details. Can I use american buttercream for the pipping? Also, does anyone know how to stiffen IMBC?

Yes, you can use American buttercream for piping.

Yes you can use ABC and also you can use royal directly on SMBC/IMBC. I do it all the time.

Thanks guys! I will give it a try. I have a couple of customers who HATE HATE HATE american (dont blame them!) and one of them wants a cake covered in lace work with some edging that has to go above the cake, so it needs a pretty stiff icing.

Thanks again for your help!