Hi Boris,
These guys do a great selection of Military paints in tins or sprays. Once you have the container stripped and ready to paint I would advise:
OLIVE DRAB BS 381-298
Finish: MATT
Which you can buy direct from: Industrial Paints | Welding Safety | Lowest Prices | Free Delivery
Unless you have the same rivets, I would carefully spray or paint around them and leave them in situ IMHO. They also do a service that if you send them a chip of the original paint they will match it up for you, but I would say the Olive Drab is about right.