I go through a whole ritual
Before I work on a blade, let alone shave with it I go through the same ritual with any (especially and ebayer) will all razors.
First, I drop it in a container of dishwashing liquid an water and let it soak for 10 miniutes. Then it clean it with a tooth brush and scrub pad to get all the crud off.
Then I soak it in Jewelry Cleaner fo 2 to 3 miniutes and scrub with the tooth brush and scrub pad, again. The razor is then place in a container of rubbing alcohol. So far, I haven't had a problem with celloid, plastic, or bone scales. Let it soak in the alcohol for a couple miniutes.
Then I'll either dry the razor and continue working on it or if I'm done with it for now. I'll put a coat of Castor oil on it, put it in a baggie, and put it away till next time.