I had a photographer friend who had cameras stolen so often that he would intentionally mar the surface of new cameras using just a nail. To him, they were just tools of his trade and he realized that people don't steal cameras that are cosmetically marred. No resale value.
Doing such is repugnant to me, but I could see his logic. In your case, you likely want to add "character" to your gun, but as someone above noted, guns that are properly cared for develop different characters over th years than ones that aren't. In the case of my friend, he marred the cameras externally, but took meticulous care of them operationally. He had them lubricated and calibrated at regular intervals and they lasted for years (and weren't stolen).
To remove beautiful bluing is something I can't do to a gun, but as it's used, edges wear and the gun acquires its own character. Creating it before it's time is a matter of art, like building a rustic ranch house. That makes it difficult to give precise advice, as we don't really know what you have in mind.