As to the "how do I remove the cosmoline" question, I've found that using liberal amounts of Brake Kleen is the easiest, and quickest way of de-cosmo-fying. You can buy it by the gallon at Pepboys, O'Rielly, or Autozone.
I went through my collection the other day and was surprised to find that I have 3 91/59s. I remember getting the first one but not the next two. That is the danger of Mosins. They eat your brains.
Here's some Mosin porn for all of you. My friend brought his ex-Dragoon M91/30 over tonight to meet my M1891 and we snapped some photos with his iPhone: