Updated the custom wear variables (used for rust/copper oxidization) for cleaner implementation and more configurability for future items. (Readme updated accordingly)
Fixed painted_metal's add gradient accidentally having randomized scale
Rust and copper oxidization share scaling with the layers they apply to instead of being fixed scale.
Said changes don't really change the look of the skin, just under the hood stuff. It should look the same, so promos are untouched.