Hi Guys: I would like to know how you put on some "Dirt" on your models. On my tanks and some planes I use two mediums: Almost dry water colors for "oil smudges", "mud", gunÂ´s smoke etc.... Colored Chalk on sides of tanks, wings, tails, etc...... (I use a brush to smooth it) I sometimes make a very clear wash with water color and it looks pretty good. You can do this on your flat parts and pass a warm iron on it. And I defenitlly use my PC paint program which is Photoimpact :?