clean the eye and dry. paint top and bottom with black.
i use gold rub on, with q-tip random spots
same thing with silver
then i use any cheap black spray paint
bingo, a goos all around gen. fish eye.
i use tis eye mostly on trout and salmon, this one came out just on the dark side but thats o.k.
i have paint sch. for most fish eyes if you need one or just want to try some for yourself.