Jarrod Ross, 28, appeared in Warrnambool Magistrates Court on Friday where he made an unsuccessful, self-represented bail application.

Police allege Mr Ross chased another man in his vehicle on Raglan Parade on April 17, at one point aiming a sawn-off shotgun at him through the window.

Detective Senior Constable Joe Fisher, of the Warrnambool police crime investigation unit, said Mr Ross later exited his vehicle and struck the victim's car with a bat, causing damage.

The victim drove to the police station in terror and a report was made.

Detective Senior Constable Fisher said subsequent search warrants at properties in Warrnambool and Dennington uncovered a Pyramid air rifle, various ammunition and a vial of steroids.

Mr Ross is a prohibited person under the Firearms Act. He was not present during the raids.

Then on May 31, the man allegedly attended his former partner's home and stole the key to a 2013 Holden Commodore sedan worth $30,000.

The vehicle was reported stolen in west Warrnambool overnight on Tuesday and later found dumped in Saint Leonards, near Geelong.

Detective Senior Constable Fisher said Mr Ross was arrested by detectives in Colac on Thursday about 11.30am.

The officers were on their way to get a coffee when a member of the public reported a possible drug deal being conducted in the Johnstone's Lane car park.

They intervened, Mr Ross was located in the front passenger seat and found to be a wanted man.

A subsequent search allegedly found him in possession of 26 grams of methamphetamine, with a potential street value of about $20,000.

Police also allegedly uncovered 500 ml of GHB, quantities of Valium and Viagra, a taser, ammunition and $2000 cash suspected of being the proceeds of crime.

The court heard Mr Ross told police the illicit items weren't his.

But Detective Senior Constable Fisher said the accused was using up to two points of ice per week and was likely trafficking to support his own habit.

Mr Ross told the court he had stable accommodation, family support and employment as a labourer.

He was refused bail and remanded in custody until May 25.

A Colac police spokesman said a combination of diligent police work and crucial information from the public led to the arrest of the wanted Warrnambool man.

"It just all clicked into place - diligent police work, timely information and a much needed coffee run combined to result in the arrest," he said.

The police spokesman said that without the information from the member of the public police were highly unlikely to have been able to identify and arrest the man.

"That information was simply crucial," he said.

"It shows what can happen when information is provide to police in a timely manner. Anyone with information about crimes being committed is requested to immediately contact their local police," he said.

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