Beautiful weathering!  Totally realistic patina and streaking.  What's your method?

Really, really nice work.

Mike

Sorry for  the slow reply Mike.. been out an about today.

The basic techniques use a rotring black ink/water wash from the top of the vehicle down, then a brown ink/water wash up the vehicle . I make use of good quality colour photos of the locos being weathered to do highlights etc, 

When the ink is dry I use weathering powder to give the dirt effects.

The oil around exhausts etc is done by applying the powder to the ink while still wet and then !pulling" the mix to show the wind streaking

More details are in my thread

http://www.rmweb.co.uk/community/index.php?/topic/64160-weathering-with-ink-and-weathering-powders/

best regards

Barry