hello all just wondering what would be the best colour for a rusty burnt effect on exausts etc
i only have access to tamiya or humbrol all advice would be great thx.

You can try this product Rust-All. I have been using it for a long time and have had great results with it. You can also paint the exhaust with burnt exhaust black and follow up with a thin rust wash using model masters paint. A lot of the members also use pastels to weather their models. I have seen many great examples displayed here. I use the model masters rust paint mixed with some baking soda to get a flaky rust effect also.

Here is the URL to Rustall http://www.rustall.com/

You could also try this

https://armorama.kitmaker.net/forums/23511&page=1

Hope this helps

Here is my simple technique...

1) Apply Black Enamel paint to the exhaust manifold. Allow to dry
2) Apply a thin coat of acryllic Burnt Sienna
3) While still "damp", sprinkle a small amount of baking powder on the Sienna. Allow to dry.
4) Come back and dry brush with a 50-50 mix of Terra Cotta and Sienna. Allow to dry.
5) Wash with a charcoal (not black!) artist ink, and blot with a paper towel.

DONE!

The roughened texture of the baking powder is a nice replica of the effect of rusted metal that has been "cooked" by the engine exhaust. The older or the more rust desired, the more powder I use.

Also works great on metal roof support beams, angle iron, old oil drums, etc.

My 2 cents worth:

Mix in cigarette ash with your paint to give it that "Flaked" look. Humbrol Rust or Leather, or a mix of both, works pretty well for color, OR you can make your own rust by putting just enough water in a coffee can to cover the bottom,drop in some steel wool and let sit until the water evaporates. You'll have plenty of rust on the bottom to either use straight or mixed with a little paint. For the "Blackened" effect on exhausts, burn a piece of sprue and hold the part(s) over the smoke till it gets good and black, then soft-brush off the excess till you get the look you want (this works good for structures, too). Hope this helps.

Art

thx lads some nice ideas here ill try them out

Take clear paint put it on then use a pastel chalk to let the rubbings fall onto the clear let dry and you have a nice rusty flaking look.

I just learned something here as well. Thanks.

Well, maybe real rust would give a real rust effect.
Take some steel wool, put it in a glass jar,
Put in some water, just a little....
Set the jar on a window sill for a few days....
Stir with a wooden dowel, everyday...
This will break up the rusting steel wool, and help it rust more.
Don't add any more water, just keep stiring it, and letting the water evaporate.
In a week or so, you got yourself some of the best real rust you could ever buy.
Mix it with paint, mix it with thinners, mix it with water, or apply it dry to your models.
And the price is right...... And you can make as much as you want.... or need.... as you build your model........

This is a very good suggestion. Here is an article on how to make this real rust https://armorama.kitmaker.net/forums/16500&page=1 Fabio was the author of this technique and he was kind enough to share it with us here.

Thats great m8 thx ill try it