Hi Gepe.

I filed the wear marks from the inner hub and the outer basket on my clutch, mine were real bad. Seems to work just fine, maybe a little noisier as the plates are all moving that little bit more but its all good.
Its quite a job but worth doing. I chose the file route after getting the parts priced up!

The steel plates warp rather than wear I think. Renew the lot, its worth it to know its all new and its one less thing to worry about.

Eggsy