Weathering techniques

[Busted Bricks]

Does anyone know of a website with detailed weathering techniques? I need to make gear wheels built up from MDF look like old, used cast iron. Not really garden railway related but someone here probably knows how to do it.

So far the gear is just sprayed with a silk black. I've mixed some iron powder with vinegar to make some rust that I will try to brush on.

[planty]

have a look on YouTube at Hornbys channel, some good videos on using their weathering powders, paints on locos (both diesel and steam)

update sorry not hornby, humbrol (same overall company though ). Anyhew here's a link https://www.youtube.com/user/humbrol?feature=watch

[steamie1]

I have used this to good effect....

http://www.ebay.co.uk/itm/DLXBD027-Delu ... 19dae741ed

[TTHLRMatt]

I use various techniques, a straight on weathered paint however to use is Railmatch. They have such colours as oily metal and frame dirt, very good if thinned and then dry brushed with a rust colour. Dabbing the colour before dry and smeering works to great effect as well for what your after.