So you're weathering with spray paints it sounds like? Can you post some pics? I'm kind of curious. It seems to me like the paint dropplets coming out of the nozzle would be too large and not look like the paint fade you seem to be trying to achieve. In my opinion if you are serious about weathering invest in the equipment . Cheap techniques most likely result in cheap results. Just my opinion, of course.
Chris
Well, at least in my opinion. This is great for beginners who don't want to spend a fortune on airbrushes, powders, chalks, etc. I am relatively new to weathering (a few weeks) and this is my best work.
Anyway, I use basic spray that can be found in any craft / hardware store. I start with a light coat of flat white, then if need be, a second. Once that dries (always let it dry, it looks quite different from when it's wet) I take whatever color matches what I'm trying to replicate (i.e. rust, coal, oil, dirt, grime, etc.) and spray one VERY light coat. If it's too heavy, I take paper towels and wipe off the entire paint attempt (not the white, it's dried so it won't come off) and restart. If it's too light, a second will be neccesary. It's especially hard on anything smaller than HO. I have O and N, N takes more fine-tuning.
Boston's freeway system is insane. It was clearly designed by a person who had spent his childhood crashing toy trains.
-Bill Bryson