Thanks for the help as most of my brushes are a bit ancient so that doesn't really help.Hi Peter. It looks fine to me but I am not sure what you were dry brushing and that might just be the photos. Dry brushing is to bring out detail highlights and is done with a lighter colour, usually several different shades ending with a light grey or even white. I cannot make out much of a drybrush effect in the pics. I can see plently of streaks and dirt effects which look OK, but if that is what you were dry brushing then that is best done with washes and pigments. The end of the tarp, for instance, would benefit with a dark wash first to get 'in' to the detail 'lowlights' after which to drybrush with a couple of lighter colours of the base shade, perhaps a little white or light grey at the end to bring out the highlights. As the vehicle is painted metal I would dry brush some metallic wear and chips using Uschi Metal powders in places where you would get it. I hope that helps.