I do like the weathering on the footballer. That effect of effectively outlining a panel in dirt and leaving the centre clean with a sort of 'radial fill' of weathering going out from the centre almost [but not quite] to the periphery - wonderful.
The key to realistic weathering is to copy what you see in good photo's of the prototype, I see too many interpretations, usually at exhibitions, where it's obvious that they have just invented the weathering in their heads instead of doing the research, and it looks bloody awful.
There are plenty of photo's available on the internet and in books. Colour photo's are preferable but a lot can be gleaned from b/w photo's also.
For Eastern Region fans I can recommend two books by Peter Swinger ' On Great Eastern Lines' and ' Steam In East Anglia'.
ISBN 0-7110-2502-9 and 0-7110-2687-4 respectively.
Col.