Hello.
Well....grunge images converted to brushes, already existing grunge brushes, and grunge texture packs all vary in the textures. Not all are suited for this effect..........so the answer is both yes and no. It's a matter of choosing the right one that suits your needs.
No tricks. The blend mode of the actual brush can be changed to suite. The blending mode of the layer can be changed to suit. It's again a matter of what is creating the effect you desire!
I usually, unless called for, always use grunge type brushes in normal mode settings and normal layer blending mode. At the most, I will change the opacity of the brush or layer.
Work in layers..........get one layer looking the way you wish and then use another layer if you want to add more, This gives you the opportunity to not only go back to an existing layer if you mess up, you can change the settings/blending options on separate layers.
You can also control the color of the grunge layers by clipping H&S adj layers or Gradient adj layer or Gradient maps. (I always use black as my brush color and change with H&R adj layer if needed)
Orig
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Green
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Red
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Two separate layers of different colors blended
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Open your Brushes panel while using a grunge brush. You can make many adjustments to the brush............in other words, you don't have to use the brush as is. Experiment with different setting until the brush is doing what you want. If you get it just right, create a preset that you can use in future projects.
Don't limit yourself to "grunge" brush sets only. There are other brush "sets" with textures that may also work. For instance"splatter" sets have some brushes that are perfect for a grunge effect.