I have had time to paint some stuff this last month, and among them were four of the blue 40 foot boxcars. N-scale of course. And lightly weathered. I found the TCP "auto grabber blue" to be a near perfect match to the factory blue that Atlas uses. These are a little darker, of course, due to the weathering. K4 decals per usual. Testors clear flat with a light black oil wash around the details.
Hah, and now I see I did not get all my bits of cotton picked off the cars. Oh well, nothing a little brush will not correct.