Using a flywheel

With the wealth of knowledge and sharing on this list, I am hoping
someone can point me to and pictures of textures that can
be created with a flywheel and how they are done. I have an inkling
of an idea that the flywheel will produce a shiny marquis shaped cut
in metal and would like to explore that along with what other effects
that can be achieved with a flywheel.

Thank you all for a wonderful resource.

Trudy