I'm curious to find out what you guys suggest as the next steps for this N scale MicroTrains 2-bay ACF covered hopper. I plan to make it reasonably ravaged by cement spills, but not so grunged that the lettering is obscured.
So far, the car has received an initial grimy acrylic wash, then some weeks later (last night) I sanded the "MKT" lettering and mixed some black and white water mixable oils in 70% alcohol to create a pale gray milky wash. To both fade the car and simulate cement dust accumulation, the gray wash was brushed on then gently sponged off with makeup sponges after a few minutes. The oil paint sticks well to the car and the sponge gives good control over how much paint stays on the surface. The ends were done similarly but used brushes instead of sponges to remove the excess oil wash. As it has dried, the color has lightened up some and the oils have a satin sheen to them that will need to be matted down.
Clearly there is more to be done, and I thought I would be interesting to get your collective advice before I start cementifying!

I like how the gray creates a reddish tone on the bottom of the lettering. I plan to preserve that if I can.

The sanded letters look pretty thick but this is a very close shot. From a foot away it is not noticeable at all. Ignore the various detritus stuck to teh car that shows up under magnification!

Hatch covers need some work at their base.

All feedback appreciated.
Best, Coxy