I wouldn't use Acetone, lacquer thinner, MEK, brake or carb cleaner on the metal - it will strip any brown patina (old oil, etc.) out of the finish and 'bleach' the gun. Any kind of mild solvent, like Clenzoil, mineral spirits or Naptha will get it as clean as it needs to be. Breakfree CLP contains Teflon which I also wouldn't put on a Parkerized vintage gun because it tends to fill the textured Parkerizing and polishes when touched. Actually Clenzoil is a pretty good CLP for this use. If I hadn't 'bleached' a carbine with brake cleaner I wouldn't know.![]()