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OK! Question, How would you weather the grill works on a GP9, on the long hood, along the side at the top?
I'd like to leave most of screen green but the area of the filters dark gray or black. I was thinking a marker pen, but that may not be the way to go. How would you do it?
I'd suggest using black chalk/powder and a stiff brush. If not that, use black paint and give it a wash or two. I do suggest masking the areas not desired weathered.
Chalks are good and inexpensive. Set them with a shot of Dullcote. The Dullcote spray will blow away a little of the chalk, so you may need to add more chalk when done.
Another option would be Rust-All and Blacken-It, if they are still available.
Hmm time I have, hobby shops I don't have. Other than school chalk and chalk for sidewalk art, that would be all that was available close by. How about some of that war paint powders the ladies use, the clerks may look at me a little strange but I'll tell them it's a gift
Come on guys I just did the fans on my SD40 today with a brush, I used pollyscale Tarnished Black and Grimy Black thinned with some water, then dusted it wth some black chalk. That was N scale
If you have a steady hand, I would do paint with chalks, here is what I did today. If you can pull off that paint and decal job, I know you can do the rest
That looks real good David. Ok as I read it "you brushed on thinned paint and brushed chalk dust on (before it dried) or (after it dried)"
My hands are pretty steady, eyes are pretty good with glasses.
LOL if you only knew the half of it but thanks, I get away with a lot of mistakes.
I'll put in an order for some paint, theres a MR show Sat. and I can pick it up there. Chalk, well that's another story I'll have to make do with what I can find available. Other than craft supplys at Wall-Mart the cupboard is bare. As they say necessity is the mother of invention.
After a coat of Dull Cote, I weather grills with chalk. I envision our locos as operating in the dusty environment of coal mining operations, and, since the locos are black, highlight the grills with dust colors. For a green loco, black/dust would look good.
I think Willis it depends on how much you think you will be handling your engine(s) as to if you need to seal them, I normally don't on mine, and I handle them a lot for cleaning and rotating. As for the chalk schedule, I painted first, then let dry and then chalked them. I added a small discussion over on the weathering thread.
OK thanks, I don't believe they will be handled all that much, there will be 6 or more road switchers with only 3 in use at a time and the rest in storage off the layout. There are 5 urban areas on the CB&CNS so the RS units get moved around after shop maintenance. The Mainline Loco's remain pretty much the same lashup on a daily basis.
I'll do the " paint/wash , dull coat and chalk " method.
Thanks
One tip Willis, less is more, always apply less then what you think you need, you can always add more weathering, it's hard to remove if you over do it.
Willis
I just did the fans on my SD40 today with a brush, I used pollyscale Tarnished Black and Grimy Black thinned with some water, then dusted it wth some black chalk. That was N scale 
