Adding the spit and polish types of details to your work can really take it from good to great.
how to quickly add a grunge dirt map to any model
Adding things like dirt and grunge to your images can add another level and interest and realism.
Here, Blender Guru’s Andrew Price shows how you can quickly add a grunge or a dirt map to any model. Andrew walks through how to bake out an Ambient Occlusion from Blender Cycles, and also shows how to use masks in the Blender Node Compositor to add the grunge to only certain parts of the model.
Check out the tutorial for how to quickly add a grunge dirt map to any model in Blender here.