At the moment I’m planning to leave the valance mesh insert in its natural stainless steel state. I did think about brass but the 80th brass stone guard is very subtle behind the grille and I thought painting the valance mesh brass might be a bit ‘in your face’.
I’ll stick with ‘Plan A’ at the moment but the insert is easy enough to remove if I change my mind and go with brass.
Had my Wolf valance professionally painted red with perfect match both sides. The GT grill I hand painted with Hammerite silk black on top of their special metals primer to match fittings elsewhere. To date no sign of chips or stainless showing through.