Clio.......don't refrigerate your cupcakes. They don't need refrigeration. Then they shouldn't sweat. By the way, refrigerating baked goods just hastens the staling process.
Clio......glycerin will not stop moisture from forming on cakes. Cakes sweat under refrigeration......that's just how it is. When you talk about storing your cakes, are you talking about storing them decorated or undecorated? If they...
I would melt down marshmallows with butter in a heavy saucepan (like you were going to make Rice Krispie Treats) and then add warm ganache to it.
Can't guarantee it would work but it would be worth a try. I don't know if the mixture...
Modeling chocolate also gets sticky under refrigeration, but unless you live in super humid environment, it shouldn't be a big deal. I've refrigerated cakes with modeling chocolate on them and the worst that happens is that it will...
I used to use Fluid Flex all the time. We used to get it at this one shop I worked at, but we had to special order it from the supplier.
It is great stuff, but hard to find. I'd recommend you check with your local commercial bakery...