Harry a tip I picked up over half a century ago (before most
metallic paints were available) is...
Nail Varnish !!!!!
A friend at school (well I was still a school boy at the time) produced
a Byzantine General with impressive sparkling armour.
'Nail varnish' he told us.
'Nicked from your big sister?' we asked.
'No, I just went to the make-up counter at Boots'
Believe me 11 year old school boys just didn't do that sort of thing in 1966.