Just to update yaz. Went to halfords looking for the black satin stuff recommended by Ben R. The Halfords in Donny north bridge aint the biggest, so they didnt have a full range, but i did get some Hammerite Barbeque spray paint which is Matt Black. its resistant to 600°C, and intended for use on the inside of those metal BBQs. Was just the ticket, and has made the silencer less "bling".