I've used this method to clean stamps and tools that looked like they were used for other purposes(wax,paint,etc.) and they come out looking shiny-clean. I never thought about sharing this extremely simple cleaning method until now.
I just got some tools from an estate sale and they were pretty nasty looking. Crud in the lines of the texture in bevelers,etc.
Effervescent denture cleaner tabs. Put tools in a suitable size bowl, add water and a tab. 3 minutes later you're done. dry 'em off and start using your shiny,new looking tools. Does not degrade the metal in any way.