Shorten's walk to win Corangamite

It's not exactly the kind of thing a Labor leader wants to hear on a visit to a marginal electorate.

"Vote Liberal," screamed a heckler as Bill Shorten walked through streets of suburban Geelong, shaking hands with locals and encouraging them to vote Labor.

The heckler delivered his advice as he spotted the opposition leader, senior colleague Richard Marles and Labor's candidate for Corangamite Libby Coker.

Mr Shorten was unfazed as he strode on to speak to several locals more sympathetic to Labor policies.

One undecided voter was pleased with his plans to legalise gay marriage; another was worried about housing affordability.

But while he dropped into a cafe and dry cleaners, Mr Shorten noticeably avoided the local real estate agency and bank - representative of the sectors he's happy to pick a fight with.

Labor is pinning hopes to snare the four per cent swing it needs to win back Corangamite, which takes in parts of Geelong, the Surf Coast and Colac, from the Liberals.

Most residents are concerned about job losses from the closure of the Alcoa smelter and a slowdown in the automotive sector.

Liberal voter Lena Desaran says Ms Coker is a "lovely" person but that wouldn't be enough to sway her vote.

Small business owner Wayne Ratcliffe, who's undecided, is angry at state Labor government decisions and wastage.

"Today was a chance he (Bill Shorten) could've swayed me," he said.

Senior citizen Anthony D'Andrea is worried about pensions and could "maybe" vote for Labor.

"I will probably be undecided right until the last minute," he said.