Its best to use a primer ( spray can from Halfords ) after that has dried its dealers choice. Acrylics are cheap and dry quickly have a look at some of the guys paintings of figures used in table top gaming.
Enamels may be harder wearing.
"that's not a bug its just an undocumented creature."
Sir Terence David John "Terry" Pratchett, OBE (28 April 1948 - 12 March 2015)
You will need to carefully wash the white metal fittings after you have removed all the flashing. I did not get good results with acrylic and I was using special primer as used by the war gamers, so used matt enamel. It is very easy to obscure the detail when painting so use thinned paint and apply several light coats of paint. If I use acrylic spray cans I source mine from Nantwich Market www.arnagemotorcare.co.uk. 50% cheaper than the big car place. Dave