Another huge file size >.<
This shows the steps I took with my big Black Ace project.
There is actually another step I took. On a new layer I merged all of the colors then blurred all them, and the details, and put it on top of the original colors. Then set it to "Darken" to give it a bit of a glow. I did the same with the lines, but kept it at normal with the original lines(un-blurred) beneath it.
Black Ace (c) =Zeurel
Art by Me