Rusted using a multi step rusting process that creates a real rust patina which causes the truck to look like it stayed to long on the salt air beaches but that makes it stand out in your collection. Destroyed inside, outside and everywhere, just like a truck that is in tough shape from being outside in the elements!
Don't be fooled by others that use paint instead of real rust which takes longer but is worth it! You will se the difference between artistic work and a cheap knockoff.