A Victorian man who disguised himself, kidnapped his girlfriend and drove her to remote bushland where they spent a week wandering around naked has been refused leave to appeal against his conviction and sentence.

Julian Mathias Buchwald was sentenced to seven years and nine months jail after he donned a balaclava and kidnapped his girlfriend of two years in March 2008 while he was supposed to be taking her on a picnic.

The Indian passport used by convicted kidnapper Julian Buchwald.

He tied and blindfolded the 17-year-old and drove her six hours away to the Alpine National Park as part of an elaborate plot to convince her to marry him.

After cutting off both their clothes and burying them, he convinced her that he too had been kidnapped and tied up. They managed to free themselves before they spent a week wandering around the bush.