Chalk-based weathering in larger scales

[tom mann]

I generally shy away from using chalks for the majority of weathering in N and Z scales.  It's too hard to seal (don't even think of using hairspray on a Z scale model  ), fills in detail, and fades out contrasting base colors.  However, in larger scales, I'm thinking that chalks are necessary to get the appropriate texture. 

What do you guys think?

[Chris333]

I really don't use chalks that often either, but like you say for something larger...  Possibly you could try other methods like roughing up the area first. There are other things as well, like Rottenstone:
http://en.wikipedia.org/wiki/Rotten_stone
http://www.railroad-line.com/forum/topic.asp?TOPIC_ID=6814
Some have also used tile grout. I have some Rottenstone, but only used it once on a brick road.

On something like a steam locomotive I do like to use a lot of graphite powder though. Even worn out loco's seem to have shiney worn-in spots like grab irons. The graphite gives it that shiney worn metal look.

[Erik W]

Guys I'd recommend Bragdon Weathering Powders.  They are easy to work with and add another look/ texture that can't be achieved with airbrushing, washes or dry brushing.   http://www.bragdonent.com/weather.htm

I used them on these two HOn3 cars to get a dirty, aged bare wood look on the boxcar roofwalk and gon interior as well as some grime, soot and rusting:





Erik