Back in the 50&60s when working with 1911s. We Sometimes would Stake a 1/4 inch steel flat as a front site. Then as the shooter would shoot the gun behind the shop we woulf file the front site, just a little at a time.
when the pistol would shoot right where the customer wanted it to, we would then polisf the site and blue the pistol. A lot of gold cup shooters wanted fixed sites so point of inpact could not change, unless a hard hit or being droped.
If you have a large front site and a number 2 flast bastard you can do it just finish it off with 600 grit wet/dry paper to polish and then just spot it with cold blue.
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This year will go down in history. For the first time, a civilized nation has full gun registration. Our streets will be safer, our police more efficient, and the world will follow our lead into the future!" -Adolf Hitler,1935"