...your refurb skills? Search Jim's @jimjo1031 threads for hints ant tip on how to make them look good as new.
I was thinking about the case restoration. That takes more time and materials. Clean the razors first so you can take them for a test shave! I don't have an ultrasonic cleaner. I hear those loosen up interior grime. Old fashioned used toothbrush and Dawn dish liquid scrub is great for external soap scum.
I never event thought about the case. I think it may be out of my wheelhouse. The first couple of razors I bought, I soaked them in hot water for about 30 minutes and then took a toothbrush and Dawn to them. Worked really good. Then I got to looking on amazon and found the ultrasonic cleaners pretty cheap so I think that will be my next purchase. I've got enough hobbies that require clean small parts that I'm about to be able to justify getting one.