Before I hit the engines I trialled on cheap kit first
View attachment 181096trialling the rust,the two tone rust,the paint and faded )I use the normal colour and mix in white) and then black ‘oil’
View attachment 181097texture is possible but can be difficult to get to scale
View attachment 181098this literally creates a rust with a metal component attacked to replicate and a well weathered engine for reference with some nice coal kit nearby and rusted bogies enlarged picture, if you can enlarge further nice reference even tho Brit kit.
View attachment 181099
ok off to annoy someone else