blade coating

If the blade isn't stainless you can blue the blade using a cold blue solution like Birchwood Casey sells. I've used their Super Blue to refinish an old muzzleloader of mine and the finish is a perfect, dark black.

There are also spray on baked finishes like Cerrakote (cerakote?) as well as others for gun finishing. You could even get a small powdercoating setup that uses your kitchen oven to set the finish.
 
I used the Gunkote from Brownells in black and olive drab and neither really worked as good as I thought they should. I bought the spray cans. Before spraying, I beadblasted the blades and then cleaned with acetone prior to spraying. It was extremely runny....you had to mist each coat very lightly to prevent runs. I then cooked it in the oven and the black did ok...the olive drab just pealed off after awhile (a week or so).

I consulted my gunsmith buddy who uses it on some of his rifles and he told me to "not ever buy it in the little spray cans from Brownells....it is a different formula than what most folks spray." What you want is the cans of the paint that you run through your spray gun....you know...quarts, gallons of the liquid....it holds better and is more resistant to scratching. I have a few of his rifles made up this way and after a few seasons hunting with them...he must be onto something there, as they wear like iron.
 
I'm gonna try rustoleum truck bed liner. I know someone who uses it on every knife I've seen of his. It looks good and he says it's durable. I got a can , just have to get to work on another knife.
 
Is there any way to black coat blades yourself

I done a few black coated blades with great success. The best I have found is to powder coat it. It is very durable. Cost around 10.00 a blade. Just ask around your auto paint supply shops. It is very popular with Motorcycle parts.
You can set up for a couple of hundred bucks. You need the powder coater, sand blast cabinet and a oven.
 
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