Blued Feed Ramp on KH
 

Is there any legitimate reason for a KH feed ramp to be blued instead of in the white?

I am attaching a photo of a white feed ramp so as to avoid confusion over the part I am asking about.

Depends whether the feed ramp was milled before or after blueing.
Probably the gun was reblued at some point

The finish on the KH I am looking at is possibly too perfect and definitely has a magazine that was faked to match. What is confusing is that tell tale parts (S-coupling to the mainspring, heat treating “thumb print”, lever behind the side plate) are in the white or untouched, yet the feed ramp is blued.

I understand what you are saying about the blueing/milling order. My question is this: were feed ramps left blue with any frequency or is this a huge red flag that the pistol was refinished?