Originally Posted by Chefboiali
I got my flywheel grinded and lightened. I was about to have it put in with a new clutch, but noticed a slight film of rust starting to set in on the clutch side. Should I be concerned? Would it be a good idea to use a fine steel wool on it?

It is a machined surface, so rust will form on it. That is why new flywheels come coated with oil. Try the fine steel wool, but don't get too aggressive with it. It should be fine to install with the rust.