really nice knife and a bargain! Regarding the SOS kit, I would recommend a Fenix E01 in place of the maglite, if you're going to replace it.
That's probably a result of long time storage in that leather pouch...moisture absorbed from the air combined with residual acids from the tanning process.
I don't have the knowledge to pop off the scales
Have you tried metal polish? It the metal pitted or is it just surface rust?
Looks good as new! Splendid work!