Rust Weathering 101

I have some rust colored paint, I've used the red brwon mix with the black flatt ( tamiya ), but what I like the best is get some of the non-oil pastels, grind some of the orange yellow flesh and some brown into a nice fine powder and make a paste. Next get some of your paste on a soaked brush and thin it out on you tank where you want. It works for me, just let it dry over night and you'll be good.
NOTE:

If you don't like the way it turned out you can carefully wash it off it's only chalky pastels.

How do you grind it to fine powder? Any special tool or technique?

Sandpaper works pretty good.

Redleg how do u make the color pastels a paste? just plain water or thinner? tnx

isprol ( spelling ) alcohol and either sandpaper as Chris mentioned or if you can get one of those drug store medicine grinder (the lil' bowl thing and the lil' marlble grinder)
if you use the alcohol it dries faster when you soak it so you won't have to wait to long, I also have used water with no problems cept the drying time is longer.

I agree that Pastels and or pigment powders are the way to go when it comes to simulating rust. Burnt Sienna Oil paint also serve well for Rust colored washes.

Hi monster zero check out ( hem.Passagen.se/plasticwarrior/more.html) Tis guy is a modelling champ, and has a web site showing his work. He has won many awards for his models and dioramas in sweadan. his web site contains a section on wheathering and rust using Humbrol paints. He is willing to share some of his secrets and will take tips from others. check it out. Its well worth the trip.

Well, you could try to make something more rusty-if it is on side skirts or something thin-just thin it so far that you can make lots of holes
you could also make it rougher by using glue that you touched with your finger to make it rough.

Hey Moses. Welcome back.