Matte Black Tutorial-EASY!!!
So ive been having some requests on how I do my matte black on any gun in the game, for this tutorial I will be doing the L96A1 since this is where a lot of people need it,
First what you want to do, is to select white on your pallete and saturate the entire gun, like so:

Next what you wanna do is create a new layer, and select blend options to: Multiply

Next, take a dark black color (Or black) and overlay the entire gun or selected part:

Now, select the layer and turn down the opacity to desired darkness:
For the L96A1, 70% works fine on here, other guns wont be like this however, and its all about user preferance.

If you have any light/shiny parts that are buggin you, simply use the butn tool located under the blur tool, or 3 tools from your eraser:
My Final Product:

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All i ask in return for my knowledge is a thanks and +Rep, plus if you used this in a release I do deserve my credits!!