This article will show you how to perform realistic weathering on your God Machines.
We will start with an already painted part. This is the one from the last tutorial.
For this tutorial, you will need a decently thick brush, such as the small base brush, your favorite rust paint, and a rag.
First, get a good glob of paint on the end of your brush and line the edges inside of the trim. Do this in sections so the paint wont dry.
Next, immediately wipe the rust paint downwards while applying slight pressure. This will cause the rust paint to streak in a realistic fashion. It may look too dark after your first wiping, but you can continue to wipe more to your liking. You can wipe pretty hard before you start to scrape the paint, so don't be afraid to rub a little harder. Make sure you get the rust inside the corners of the edges, otherwise the weathering will not look realistic. You can always brighten up the colors by drybrushing the original color on top of the rust paint after it dries later on if you are dissatisfied with the darkness..
Continue repeating the previous 2 steps, section by section. Wide open spaces can be blotted and then wiped to add uniformity.
Half way done with the sectional painting and wiping. You may want to try wiping the brush off after dipping it in the rust paint until there is a bit more paint than if you were drybrushing edges and lightly run the tips of the bristles down parts of the piece to create darker streaks. If you don't like what you see, you can just wipe it off and start again until you have a satisfactory looking streak.
The other half is finished and more streaks have been applied using the method above.
Vents get very dirty. Don't be afraid to give these areas a little extra wear. Consider adding Nuln Oil to parts of the rust to add depth and different color.
Chipped paint? No Problem!. use some Typhus Corrosion to cover up the chip. it adds another color to the model and has a great corroded texture.
Here is another chipped spot taken care of.
A drop of Nuln Oil on each rivet and a slight wash on parts of the trim adds to the weathered look and gives more depth of color to the silver trim. A little bit of rust paint in certain areas also looks well.
Here is the finished product This technique can be done on any color to the relatively same effect.
The trick with other colors than white is to not wipe over the entire model. Now you know how to make realistic weathering effects on your models.