This is a grunge texture I came up with in the shader editor.
Gumroad link: https://sambowman.gumroad.com/l/lbryy
All blend files available on Patreon.
Patreon - https://www.patreon.com/user?u=43779525&
Discord - / discord
Instagram - / snow.mamba
Reddit - / blender_sam
Artstation - https://sambowman.artstation.com/
Gumroad - https://gumroad.com/sambowman
Intro: (0:00)
Node preview: (0:27)
General setup: (0:45)
1st pattern: (1:31)
2nd pattern: (6:00)
Mixing the patterns: (9:03)
3rd pattern: (9:39)
4th pattern: (12:08)
Color, roughness, and bump: (15:03)
Variations: (17:21)
Further explanation: (20:46)