Hi Jamie,
Personally, i used a product to blacken the steel which made miracle. I cannot make the difference between a new part !
You can find this stuff in a hunting store or the hunting section at WallMart .
This product is used on the FireArm to restore them and it's not expensive .
You can make a research on BLUING Steel !
When you blacken(Bluing) steel it is like a dyeing!
I did all the parts such as Drives Shaft , Tie Rod , U'J , Diff Outdrive and also Screws .
Here is my Tip
ROY