I'm currently in two minds over the blueing kit you used. In the past I have used the stuff to good effect on some rifles that could be called 'collectables' but were too badly 'gone' to rate that description in their current state. Results varied. Some took the blue very well and I acheived a good deep gloss; others did not and seemed to give a blue-brown colour. I remember one, a pre-war Diana 27 where the cylinder and barrel did well but the trigger block would not take a good colour no matter what I did. As these rifles were not to be shot too often I did not worry. But:
I had a TX200 with a, frankly, really manky underlever so decided to refinish it with a home blue. This I did and the results were very good with an eventual deep gloss. Excellent, I thought. A few hundred shots later and I have noticed a distinct 'wear patch' on the underlever from where I grip it to cock the action. I can only assume that the cold blue is not very resilient to wear compared to a traditional hot blue. Maybe I got it wrong somehow? I don't know. The lever looks better than it did before I started so I am leaving it 'as is' for now.
Cheers, Phil