I sprayed some speaker grills using Platicote metallic silver spray , but when i lacquered them they lost their metallic finish and went a dark grey . Your probably better off using renaults titanium sliver ( paint code 640 ) and then lacquer em.
First get some plastic primer , i used white , from halfords .Then after spraying em with primer rub em down with some very fine wet n dry paper ( 320 grit should be fine enough ) to get a good smooth finish .Then when your happy they are smooth spray em with the titanium spray but only light coats and not too many as it takes f*ckin ages to dry and if the paint is on too thick they mark easliy with finger nails etc .. , if the finish is not too smooth you can rub em down inbetween coats of the titanium silver until the final coat is smooth . Just remember " NOT TOO MANY " coats about 3 or 4 should be enough . I got carried away and managed about 10 coats so the paint stayed soft for ages . Then give them 1 or 2 coats with clear lacquer and let them dry . if you have somewhere warm to put them , like in an airing cupboard they will dry much faster .
