My substance file "Damaged Wall" presented during my talk at GDC is now available on Gumroad:
https://gumroad.com/l/KAkRg
Package contains a full source .sbs file with 5 graphs:
Damaged Wall - Concrete - Paint - DamagesGenerator - BulletHoles.
All graphs are well organized with frames and comments for ease of use.
If you're just looking for the texture Itself, you can purchase It separately:
https://gumroad.com/l/tpkfn