As soon as graffiti is spotted in the town Mr Douglas is on the job to remove it.

As the leading volunteer with the graffiti trailer, he has helped remove more than 40,000 square metres of graffiti since August 2008.

The volunteers have saved Hume Council and ratepayers more than $1million in what it could have cost contractors to remove the graffiti.

"Every $1000 saved is something that can go into a school or community centre. I'm in the twilight of my life and just want to put back into the community," Mr Douglas, 62, said.

"I work every day of the week. If you can take it off as fast as it goes on it's better ... they put it on, we take it off. We have more patience than the kids.

"I get a sheet every day of what people are reporting to council or the police.

"The amount of graffiti around Sunbury was a complete eyesore.

"I had been taking it off a little on my own before I got involved with the trailer." Mr Douglas worked with the Sunbury police, council and the Justice Department in the push to get the trailer for Hume.

About a month after the trailer service started, 22-year-old Will Heagney, who is deaf, also began volunteering.

"His parents wanted him out in the workplace. His mum approached us and asked if we would do something. It's helped his cognitive skills. It's a do-good, feel-good story for me," Mr Douglas said.

"Will and the other volunteers work on weekly basis ... we also deal with young offenders, mostly those caught for graffiti offences, and they come out and help clean up."

Mr Douglas said there had been a significant decline in the amount of graffiti since the trailer service began.

"I can tell you we used to have 64 individual taggers, it's now down to nine or 10. [The police] caught two last Wednesday."