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]

Dip in phosphorus?.. Powdercoating is best. Go to eastwood. I use chassis paint in my rears

[Langing]

Dip in phosphorus?.. Powdercoating is best. Go to eastwood. I use chassis paint in my rears

In what product would I find the phosphorus? I thought that was a dangerous chemical element because of its high reactivity; remember HS chemistry class being shown how rapidly it burned when exposed to oxygen. Is "dipping" in phosphorus a DIY job?

I'm going to have to do some research (tomorrow) on powdercoating; have zero experience with it. Have heard people talking about it but know nothing.

Eastwood is the name of an auto paint company, right? And I'm also guessing the "chassis paint" is an Eastwood product?

I saw your photos. The black is fine with me and I'm assuming that "chassis paint" must be a long lasting coating. Do local auto stores carry Eastwood products? Do you spray paint and if so how do you do it? I've been using cans.

Very much appreciate your taking time to address my questions.