I have written several articles about weathering that have included, airbrushing, stains, washes, dry brushing, and chalks. One more technique that I have used is called "Bounce Weathering". This technique has been written about by many authors. I am here posting it on my web site to refresh some memories. "Bounce Weathering" is an effective technique that involves aiming the paint spray at a bounce target such as a flat sheet of cardboard. This technique can be used with an air brush, but is also highly effective if you use "rattle cans" to do your painting and weathering. The bounce technique allows for a fine mist to adhere to the item being weathered. The amount of coverage depends on the distance of the item being weathered from the bounce target. Through careful aiming, you can also blend colors by varying the distance from the spray head to the project surface.

When you are set up, aim the spray nozzle straight down at the card (target) while slowly rolling the car past the target. For heavier weathering, repeat the process. This technique will give you the fine "road dust" effect that is kicked up from the ballast as the train rolls along the right of way, and will work on any piece of rolling stock. You can use this process on locomotives, but the wheels or drivers must be be powered and turning for it to be effective.

I generally use Floquil Earth or Grime when doing "Bounce Weathering". Earth works best for Western Railroads, and Grime works best for Eastern lines.