No, I only have a very sad story of a very sad papier mache mushroom to offer that was involved in a stupid accident by a brainless tinkerer. -_-
At least that gave me an idea though. I can mix the glitter into sealant and thus varnish the blue part and at the same time add more glitter to it for a more uniform look.
I wonder if I have any beads that fit. I'll go and have a look.
(Originally 1.5 months later)
At long last, here's the finished cupcake! Err... the photo turned out somewhat bluish. I added a tiny bit of glitter to the top as frosting before I glued on the brown and crystal beads with pva glue. Most of the time the holes in the beads are barely seen.
Next time I'll tell you what I did to this poor shroom. Here it was still fine, just given a basecoat of white. Don't be fooled by the photo - this is huge! It's twice the height of the cupcake, about 20cm. I bought it as a background prop for photos with faerie dolls.