I'm a big fan of the concept of 'search and reapply' - finding techniques in related fields and using them in your focus area.
I've been dipping my toe into the online community around custom action figures, and in my search I found this fantastic tutorial on adding battle damage. Very clear, lots of pictures, and nicely detailed. You can see the full review at FireBlade Comics. The end result is quite amazing...
If you see any techniques that can be reapplied to minifig customs, drop me a line and let me know!
