I was going to pose this question on rimfirecental.com, but they have completely changed their forum & I can't figure out how to sign in.
I'm rust blueing a 142-A. It's the old type with the T type bolt handle & wood fold-down fore end.
I bought it used on GB.
The bolt shroud as bought is not blue: it's bright. My 142-K is of more recent manufacture with the plastic fold-down fore end. The bolt shroud on it is blued. It also differs in that the cone shaped rear is grooved similar to a beehive.
To blue or not to blue: that is the question.
Thanks,
Henry