Jeff thanks once again for taking the time to post your notes. This is really helpful stuff -- and I didn't even know that AIM made washes (tho I do have some of their powders). I'm gonna have to get me a gon or two just so's I can try this out.
I've also been looking at some O-scale stuff recently and I'll have to try out the Krylon Matte Finish to see what the texture looks like, esp. on wheels & trucks.
Ed