I was recently asked to do a rollerskate cake (carved, 3D) & don't even know where to start with it!!! Anyone have some suggestions?!
Here's a link to 3D roller skate cakes from the galleries:
3D roller skate help threads:
I don't know if you're willing or have time to purchase instructions, but Earlene Moore sells a 13 page tutorial for a 3-D ice skate cake that I'm sure can be adapted (scroll down): http://www.earlenescakes.com/store/instructions.html
I recently bought her baseball glove & basketball cake instructions and they're great.