I posted a while back about Klingspor hard rubber abrasive blocks for cleaning
up tools.  I cleaned something up so I posted before and after pics. I was
expecting this to have a bare lapped surface, but it was plated, the plating now
dark or missing. The result isn't shiny bright but it's now a good clean user.
Inset areas were cleaned with a brass brush

https://kfoley.smugmug.com/Misc/i-dxxcRqk/A

https://kfoley.smugmug.com/Misc/i-k2JzSr4/A

Kevin -- still playing with tools instead of woodworking.