[s-cars] Cleaning of catalysators ?

[joeamund]

Hi to you all!
I have two used RS2 cats that has been driven for a while with a broken O2
sensor and is in my opinion contaminated with carbons, but I would like to use
them on my car if I could get them cleaned.

Is there any way to clean used cats either mechanically or by
solvent/chemicals?

Anybody with some experience in cleaning?

Best regards Joern, MTM RS