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.

[Special_Edy]

I never understood how people can believe that lightning can jump miles from the ground to a cloud, but somehow 3 inches of rubber will stop it. Wont it just jump the 6 inch gap from your undercarriage to the ground, since it just jumped 63,360 inches to the cloud (supposing one mile). I dont think its because the car is a faraday cage, I think that has to do with electromagnetic radiation. Faraday cages are used to shield electronic devices from electromagnetic interference or even an EMP. If your car was a faraday cage your cellphone would be unable to recieve a signal inside it for example. The skin of the car is 1000s of times more conductive than its occupants or the air space inside, so naturally the electricity takes the path of least resistance. If it can jump through air, your car is a cakewalk. They say airplanes are struck by lightning extremely often, but no damage occurs due to the airplane's conductive skin.

The ground straps you see on cars are for static electricity. They are often required on airport vehicles. I think it is due to the static charge which builds on planes from them traveling through the air at high speeds. Your fuel tank filler hose is actually constructed of a specialized type of rubber and often grounded, the simple act of gas pouring through when you fill the tank would generate enough static charge to ignite the gasoline if it was regular rubber.

You dont need antisieze, probably the #1 time its recommended is different alloys of metal threading together, like a steel spark plug into an aluminum head. You can use just about any lubricant other than water as an anti seize. I prefer some used oil from my last oil change.

This post has been edited by Special_Edy: Jun 20, 2014 - 11:05 PM