Join Date: Mar 2008
Location: Rochester, Medway, Kent.
Moved to Modelling and Painting
Depending on what you want your rust effect to be on, not so good for detailed work but good for vehicles and such:
Try running some super glue along areas you want to look rusted then dust the glue, while its still wet, with baking powder. It sets the glue instantly and gives a great textured surface. Then stipple with browns, blacks and oranges until you get the desired colour.
Its worth experimenting on some old card or something first, just to be sure of what you're doing and likely result first.