Nice rifle! I picked up 2 over the years, one as a shooter, which is in good shape for 120+ years, and one that is immaculate (looks like it was made last year). The shooter is still nice, and shot well with some 7mm reloads I made up for it. I like them for the history and great craftsmanship. The actions are very smooth. I imagine all of these rifles are collectable and will appreciate in value over time, so its probably best not to clean the stock in any harsh way. The metal can be cleaned of years of dried grease and coated with a nice wax to keep it protected.
On my shooter, the rifle was actually in much better condition than advertised. The "rust" was dried up grease, which had protected the metal very well.
I picked up a no-gunsmith scout scope mount for mine, but have not fitted it yet. I like the look of the classic rifle, but the sights are tough to use for my eyes, so an optic helps a lot. I can still shoot it at 100 yards, but I just get much better groups with the optic.
A decade ago (time flies!) I was would get an antique Finn mosin from Pat Burns now and then when I saw a nice one under $200. They were awesome, I should have bought more!