They did clean up pretty well. The black beauty came out close to mint I used the old CFM method to get them back into shape minus the 3 in 1 oil treatment. @Cartridges the Black Beauty has an H4 date code.
Here is how I do it compliments of a seller of razors I chatted with last year. My only modification was to switch over to Kaboom bathroom cleaner.WOW!!! What is the CFM method? That is amazing!!!