Bought this this weekend and I noticed when I got it home that it is a full 1/4" shorter than a Gem Jr.? Why? Also there is some corrosion issues I need to deal with. Specifically it seems the original owner let it sit in something that ate through the plating in some spots. I managed to remove the accumulation with Neverdull but the raw metal is still there. Any thoughts on how to cover this to inhibit the rust.