[Charley Lillard]

I can't tell any difference. Get something like a stainless salad bowl etc from Walmart that is big enough to hold the parts you want coated, put some solution and water in it on a outdoor bar-b-q and get it hot. Put the parts in and make nut and bolt soup. Have some tongs or a ladle for lifting the parts out to check on the color. When the parts are dark enough for your liking take them out, rinse and then coat with something like WD40.