Hi all
My father-in-law has an old BSA Airsporter - nothing special and very old.
It has most of the blueing in place but there is a little bit of rust showing on one side.
Can anyone advise the best way to address this? (Within reason considering age & value)
I don't want to do a full strip and send off to a pro bluing company as the rifle is probably worth 50-80 quid but getting it to look a little better would put a smile on F-I-Ls face so some effort on my part would be worth it.

Any feedback greatly received.
Cheers Danny