Just apply over a grey to give a convincing black without the need for dry brushing tricky areas. I then applied pure black over the straps - after the dull cote I actually added more gloss varnish over the staps to make them shiny. This doesnt show up so well in the pics but looks quite nice.
Fairly happy with these though the AB prussians aint perfect for this regiment which, actually, wasnt really prussian at all....
Im now pretty much done two full brigades from Yorks corps. Im planning to do a big post with all the units soon.