The rust eh? Darker generally and brighter orange at the really oxidized points. Cheers gents!
Ah cheers Paul. I like the doors too, so may have to have more of them coloured, rather than 'stained'. My work has me plodding around old original 1950's-70's fibro/concrete houses. Some of the garden sheds and outside dunnies provide particular inspiration for very basic, and very weathered post apocalyptic builds. Today's concrete shed had a beautiful light teal paint job which had faded and was lightly rubbed back to concrete in areas. That may get used in one of these concrete monstrosities.

Cheers
Matt