Peter I have been using Vallejo paints since came on market. In the Model Air or Model Color I find no equivalent. Polly Scale Lt. Freight Car Red F414352.
Best suggestion I have is to start with a mix of Model Air Rust 71.080. 50%. and Mahogany Brown 70.846. 50% which will provide the best starting point I know. You will have to change shade from there if desired.
And Bruce for Floquil “Grime”. Vallejo Model Color Black Grey. 70.i62. I have no current suggestion for Weathered Black with the purplish black look.
