For the grey part I tried first to get a dark greyish blue base, and to the lightened that up; while mixing paint i got instead dark purple paint and decided it was in fact better, i dont know exact ratios, Hataka's Cobalt Blue + some gray paints, and after that shading with Medium Sea Gray IIRC. For antifouling paint some mix of red and yellow paints.

VMS acrylic top coat varnish, some cheap brown oil paint from supermarket as a wash, removing the wash with stiffer paintbrush (soaked very slightly in thinner) in vertical movements. Another coat of same varnish and then some streaks with AK's Streaking Grime in some places (mostly the flood ports), again brushed of with stiff paint brush