What is the best way to protect bare iron metal from rust? Options

[Langing]

I picked off a steering knuckle from a junkyard Celica, removed the ball joint and wheel bearing, and cleaned it with a wire wheel to the point where it seems rust and yuck free. Now it is almost all bare metal and I have two questions:

1) What is the best/easiest way to remove the remaining rust? (I don't have a sand blaster.)

2) What is a good/long-lasting way to protect the bare metal from rusting again?

To show what I am talking about I include a photo of the newly cleaned SN next to my Celica's SN (the one with with bent ears). The junkyard SN is the lighter of the two, the golden rust colored one; it came from a red 1995 Celica and is going on a white 1994 Celica:



Thanks to anyone who takes time to help me by discussing these questions.

[njccmd2002]

if lighting strikes, it wont strike the hub, it will strike the metal of the car, or ground, in which case your tires are rubber.

when i fitted my hubs, you have to remember that the struts are painted, too. in any case, the more exposed metal you have the rust potential. my strut bolts to hub were so affected with rust, it was crazy, any ways i always use



it will guarantee me that i wont fight with rust again