Something a little bit different, for me, at least.
This coach is to be lightly weathered, to represent a vehicle running in the 1930s. I don't envisage using large quantities of anything, but the difficulty will be to portray a very light coat of dirt without making it look blotchy.
I plan to use pigment for most of the work - AK Interactive Dark Earth. Application will be done using small brushes, probably a round no. 2 and a filbert no. 2 or 4. Being a panelled coach, the real challenge will be to represent the dirt buildup around panel edges, and then to photograph this so that it can be seen.