Curious on how I could make realistic texture on tanks


I’ve removed the Zimmerit off of the Brummbär in an attempt to make it look like it’s in its priming phase, but in doing so has completely removed the texture of everywhere that had Zimmerit. I’m wondering if there’s any easy way or guide somewhere that anyone knows of that could help making the texture for the side, as I don’t have much (any) experience in making photo realistic markings on vehicles. Any help is appreciated!

Also, please forgive if I posted in the wrong category, I’m not used to this website.