PUNISHER SKULL Decal tutoria wanted

hi guys, I am fairly sure this is the right place for this topic, but I may be wrong (if so please inform me before removing thread)

I am wanting to make a punisher skull decal for my club, as I wish to upload the designs to the storefront, but cant as im using a locked design.

does anyone have a tutorial on how to make a punisher skull in forza?

any and all help would be much appreciated