45/70,
H&R will reblue and color case harden finish the H&R 1871 LLC (current models) guns, but I don't know about the older H&R's. It used to be $10 for the barrel reblue, $15 for the color case hardening, and $10 for shipping. Might be worth a call to see if they will do it, the toll free number is 866-776-9292. $35 isn't bad to get her looking like new again, if they will do it??? If they will do it, you might get them to tighten her up too.