ReTexture Base Game Machines Help?

[Legioneod]

I'm interested in adding textures or retexturing most of the tractors/harvesters in the base game to give them a more worn/weathered look when their paint condition goes down currently all we get is small scratches but the machine still looks new.

I noticed in the Giants editor that there are scripts for the dirt and for scratches textures, is it possible to add other scripts/texture to existing vehicles to replicate other weathering effects?
I've never worked with scripting or modding before so I'll need to learn. Any help would be greatly appreciated.