Hi there
Have been experimenting with using salt as a weathering technique for simulating small paint chips, very simple very fast
Step 1 - Apply undercoat - metal or rust effect
Step 2 - Lightly brush the affected area with water and apply Cerebos table salt over the water
Step 3 - Allow to dry for an hour
Step 4 - airbrush over with Tamiya Acrylic, differing shades at differing angles can also give the multilevel paint effect
You can also vary the salt particle size or quantity of salt to give a heavier chipped effect
Step 5- remove salt with coarse brush
Step 6 - streak rust with oil and enjoy meal
Thanks
Mike