I am just curious if anyone has ever combined leftover mousseline and neoclassic buttercreas from previous projects? I hate to throw small amounts of leftover buttercream and almost tempted to just combine them. I use leftovers for writing, decorating cakes, flowers. Lately, I do not have any new projects to use them on and I just want to combine and re-purpose it. If it does not work, then I will hate to throw it away. I just want to play it safe.