Beetles sold in New Zealand were originally Australian made. There was a small assembly shop in Auckland that put together Australian-made CKD kits in the mid 1960s. But after Australian manufacture ceased in 1968, New Zealand imported fully built-up Beetles both from Australia, and Germany.
The '1302' was not sold in Australia. We got a version of the European '1302S' that was assembled here from CKD kits and sold as the 'Superbug S'. It has become common practice in Australia nowadays to refer to the Superbug as the '1302' or '1303' - I suppose people think it makes them sound kewl. I don't know what name they used for sale in NZ, or whether your car was made in NZ or Germany. The manufacturer's plate will tell you.
Yes as Lee says, Australian-made VWs did not use wax. Yours could have had an aftermarket treatment at some later stage of its life. Companies like Endrust used to be very popular, but modern cars don't need it as much. Volkswagen AG used full body cavity hot wax flooding on their cars from the early '80s on (have a look under a T3 Kombi!), and nowadays they use galvanised body panels extensively.
A good alternative to fish oil for home application on an old car is Lanotech - see
http://www.lanotec.com.au/