A high-ranking Finks bikie arrested on gun and drug charges at a North Wollongong industrial unit on Thursday morning will remain behind bars until March after a magistrate decided he was too aggressive to make a bail application.

Legal Aid lawyer David Ryan told Wollongong court he had been unable to get proper legal instructions from Troy Fornaciari since his arrest due to the 34-year-old's ongoing hostility in the police holding cells.

Charged: Police allege Troy Fornaciari directed criminal activity within the Finks Credit:Facebook

Fornaciari eventually appeared in court via video link on Thursday afternoon and was initially polite – until Magistrate Shane McAnulty advised him that some of his charges related to alleged threats he'd made at the scene of a motorcycle crash at Dapto in August 2017.

Fornaciari objected to the charges and attempted to explain his innocence, before launching into an expletive-laden assessment of the investigating officers.