as for bonnets, i simply paint them using citadels paints. either fortress grey, dheneb stone (spelling)?, bleached bone, or enchanted blue, and giving it a blue wash. it gives a good mix and match look, in my opinion.
iv just copied my bonnet. i mixed paints to match the colour every now and again, starting from when it was brand new to mankier, paler present state.
heres some pictures to give you a hand with the colours of them. all of these bonnets have been made as closely as possible to original designs and dyed as closely to the originals too
http://www.dougie-coull-photography.co. ... &k=d9thDh7