The screw in the fore cap is definitely wrong. It should be a flat slotted one. they can be found. As for the woods, leave as is...they have a history and the metals were originally blued, the way they applied it way back when, was not long lasted. I have many Winnies and they all show wear, some lack of colour...that is normal...the "rusting" you see is the brown patina that the blueing turns to with age, again normal. It is quite a find and should be enjoyed as it was meant to be....take her out and shoot her...she needs that. I hunt with my Octagon 30-30 rifle made in 1906 regularly during hunting season. what a joy to have and hold. My son hunts with me and carries his 1906 - 30-30 round barrel.