Check this webpage..this guy is a master at rust and he gives some tips

http://site.scratchmod.com/Home.php


Cheers
Gene

I agree, Rob Ferreira is the best rust master there is. I get to see his work in person all the time and it's even more impressive live. Just phenomenal the effects he achieves. Rob's Website

First off let me thank you guys for visiting my website and the kind words you've left here.
@SSGToms, Hey Matt thank you my friend, glad you like my models and rust. I'm looking forward to seeing you and the guys again at my model workshop in February.

Matthew, Using pigments alone either wet or dry is a bit tricky to get the most realistic result, and as with most techniques requires practice. Try using the pigments with other materials ie; oils and rust effects. Once you get the base rust on you can vary the rust tones using MIG standard and light rust effects. These two are perfect for replicating staining and streaking. By mixing the Abt502 oils with pigments you create texture to the rust. Final rusting with brighter colored rust pigments, applied dry helps finish off the the effects.

The key is to experiment with various painting materials to get the feel for the products, and of course it all depends on the type of rust you want to replicate. I use the Lifecolor rustset for a base rust color, then the other materials come into play.

I hope this helped in some way. I plan on doing some videos on doing rust some time in the near future.

Cheers
Rob
www.scratchmod.com