HHHHMMMMMmmmmmmm. Take a swipe of All metal filler across those Milodon letters, sand and scuff, paint with a combination of Rust-o-Leum rusty primer, cast iron spray and mist of black and whala you have a stock looking cast iron pump from afar and close.
It's all about the optics.
Great job and idea on the oil pump. Thanks for the info.