I'm pretty new to EDC, but I've held on to this knife since I was a kid. My grandfather gave it to me when I started scouts, and it was a little rough-looking and stiff. It got more so over the years--I wasn't in scouts long, and I'm just now catching up on how to take care of knives, etc. Anyway, I've held on to it for sentimental reasons, and I'd like it to get it looking/working good. At first I thought it was corroded/rusty, but I've since learned it was probably just a patina. I've already cleaned it up a bit with some fine steel wool and WD40, and it looks better but the smaller blades are still really difficult to deploy. Any tips would be appreciated! I'd also like to know if anyone could tell me how old it is, I found some similar knives online but no exact matches (I know it's an Ulster, but not sure what to call the scales).