yessir, different 'bluing' salts today , than in years past, and as said, higher ,MORE polish in the older guns.......the new stuff is "supposed" to be more durable ( its easier and more forgiving really, works on more different metal ,and better...BUT not the same as the old days.....in fact, more black, than blue...nature of the beast...some oils and polishes will make the metal shiny BUT do NOT get aggressive, you WILL remove the finish..............after all, bluing is ONLY "controlled oxidation....." :roll: