I watched my brother blue an old .22 and it turned out pretty good. That was 40 something years ago. I've blued a few items and it’s as good as I've seen anywhere. A little practice, a little thinking and $3.99 can go a long way! You can accomplish a deep blue luster if you have the gumption! Even stainless can be dressed quite nicely. I don't have cheap eyes and you might want to check this out. I found that there are several smithy procedures that you can do nicely.