That works on my R.C. Airplanes too !!!!!!!!!!!!!!!!!!!! :thumbpersonally, I leave my guys on the shelf till the dust ages them nicely, however, I have heard talk of soaking uniforms in coffee or strong tea to weather them
Can you please show some Detailed photos so that we can see what you are talking about? also, Nice Chimp in your icon. :devilhndWhat I do is rough up worn areas with sandpaper (knees, thighs, ass), then I get the material wet, and with white acyrlic paint, lightly dab on roughed up edges and let the paint get absorbed into the fabric. I also dab browns and blacks lightly all over and rub it in with my fingers. Once the fabric is dry, it looks old and soiled, the white areas look worn. You can do this in several layers. The fabric looks darker when wet, and sometimes the white I add looks like it's too much, but when it dries it looks natural, try experimenting first. :goodluck
Here are 2 different techniques I've done. The grey jumpsuit that the Fett figure is wearing was soaked in a small tub of water that had a small amount of black and brown acrylic paint mixed in. Saturate the material in the paint wash, do not ring out the water, and let dry overnight. The grey material has a real grimey look to it that is hard to capture in photos, the lights wash out subtleness. The photo is a little large to get a better look at the detail. The other pants were soaked in clean water and had the paint directly applied and let to absorb in or work in with my fingers. I have not attempted these techniques on dark colors.Can you please show some Detailed photos so that we can see what you are talking about?