We were talking awhile back about weathering but I don’t remember what thread it was. Anyways, I promised to show photos of 3 construction vehicles I worked on approximately 30 years ago. If I recall correctly, I used charcoal ash, real dirt and water as my primary ingredients but there may also have been some pastel chalk in the mix.
These are Majorette 1:56 & 1:60 scale diecast trucks.