Ive tried several times to revive clutch discs and have never ever had any lasting success.
I would recommend tossing the friction discs and just replacing them. They are like 60 bucks for a set. At the price of oil right now your almost wasting that much with a few oil changes in this process.
The metal discs can be de-glossed with some scotchbrite pads or not too aggressive sand paper.
From my experience you can fiddle and fight with the stupid contaminated plates for mediocre results for a month, or replace them and be riding this weekend hassle free.
And I love to fix stuff. It hurts me to say it even.