ok great thanks everyone, not sure if enamel will work though as the fast dry plastikote stuff i used for the black gave a horrible think uneven finish that i had to sand, up close its still looks kak, but maybe that was just down to the brand.
taken a look at termainal fettlers lid wow! this is the shade of green i am going for, hopefully i can get close with olive/grey/ and us light green:cheers