Johnnewby

Attached some photos, the original paint was two tone, senia details on a light umber body, the matching 2 arm version was finished black. I've managed to take the important parts off that would allow with dome drilling electric to be run internally, but I don't like the idea of modifying something in a way that it could never be undone. the top left shows the paint removed, lightly polished and wire wheel polished, the 3 arm has brass gas keys and the 2 arm cast iron keys. The bottom photo has one of the original two 5" fitters and 2 burners

I'm restoring a cast iron hanging gas light fixture. It was painted after some light surface set in. I've removed the paint and the original finish gave a light amber almost bronzy color to the metal. as I polish the surface this colorazation is being removed along with the rust. Could this amber color be a BLO original finish that withstood the paint removal process or is this some other treatment to the iron?