Wire brush reveals dark, shiny surface…

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    Hey Guys,

    I’m restoring a vintage amusement park ride car, a Caterpillar to be specific.

    The nose is full of rust, and I took a very course wire wheel on a grinder to it tonight. I expected to get down to bare metal, silver in color, but what I found instead was a hard, rust-colored and almost polished-looking surface.

    My first question is, why does this steel not grind down to a bare silver finish, and instead only go down to this hard, rust-colored finish?

    Secondly, what is the suggested solution for dealing with rust control and painting? Is this surface suitable for Eastwood’s Rust Encapsulator?


    Thanks for any advice!


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