A. Repaint the whole engine.
Alt A., Floquil BNSF green is a decent match, though just a tad darker in some cases. It should work decently though.
The photo attached was "patched" with Floquil BNSF Orange & Green in the center section of the hood, and shows the difference between my bottles and the Athearn paint. Not much.
The unit I modeled is a one off unit with a re-painted center section that was done after an engine fire, and after the H2 scheme took over, hence the H2 "BNSF" on an H1 hood. The Un-repainted sections need to be faded on mine, but that's irrelevant to your pursuit.