Originally Posted by Simon Winter:
Originally Posted by rail:
What about the chalks that are used, are they washable, or is a dull coat applied in all instances to preserve the weathering?
Don
Disclaimer: Going from memory, which is a bit dodgy these days! 
Interesting stuff, chalk!
I think blue and red as used in construction chalk lines is considered to be "permanent". As I recall from my grammar school days, it ALL seemed to come off those old slate black boards, with a sponge and water.
What I have read of weathering models with the stuff always involved use of a post application fixative to make the stuff stable, as in non-smeary. That point is where I lost interest, as I wanted something I could remove. The examples I have seen liked nice, but I think paint is probably more versatile.
Simon
