Step 1:
First off, click on the brush icon in your tools window.
Then go to the top bar, and select the brush type.
Scroll down until you see the one selected on the left.
This is the brush that gives an easy painted on, worn away sort of effect. Trust me, it'll turn out nicely.
Step 2:
Now, create a new layer, and just scribble away.
It's as simple as that! Nothing else. The effect you will get should be similar to one shown on the left.
Step 3:
Here is a tweaked version of an outcome that is possible. Just layer it, and add some text! Simple, But neat! Thanks, and I hope you enjoyed this tutorial, and learned something from it as well.

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