Special edition paint techniques


Jr Hunter
Hello fellow hunters!
I hope all of u are well !

In the near future I will start my first special edition paint up using Archiv x acrylics.
I allready painted a fugly esb , but I have no idea how some details are made since the esb don't have them.

Do anyone have a technique to paint the " crack repair " on the left side of the brow corner ?

Also, I saw a tutorial some time ago to do the grease stains using crayons, but I can't find it anymore.

Any help would be awesome and I would greatly appreciate it!

Thanks for watching and stay safe everyone!