It's paintbrushes at 20 paces, with a local artist accusing the National Gallery of Australia of buying a "fraudulent" artwork, a charge the gallery -- and those involved in the painting's purchase -- strongly deny.

The NGA acquired contemporary Gold Coast artist Scott Redford's surf painting Black Palms/High Rise in mid-2012 for around $10,000, and wanted it to be included in a prestigious exhibition of Australian artwork at London's Royal Academy of Arts later this year.