West Australian Premier Colin Barnett has used his keynote speech at the Liberal Party state conference to urge the doubters in his parliamentary ranks "unequivocally" back his leadership and focus on winning next year's election.

In a low-key address, Mr Barnett catalogued the achievements of his eight-year government, arguing it had capitalised on the mining boom and delivered development and progress for the state.

He acknowledged the Government's Achilles heel on the state's finances, with debt heading towards $40 billion in 2020 and a forecast deficit of $3.9 billion this year.

The cyclic return to GST and the Prime Minister's pledge to provide a guaranteed minimum share of GST would help restore the state's finances, he told the conference.

"The reason we have the large deficit had been the GST issue, so you can understand how delighted I was with Malcolm Turnbull's commitment last night," he said.

Mr Barnett called for support for his leadership, telling the conference he still believed he was the best person to lead the party to a third term in office.

"We've got a job to finish. I've got a job to finish. I want to do it. We've got the team to achieve that.

"And I can only do it with your support. Unequivocal support. From members of Parliament. From our backers. And from our party."

'I've never traded favours': Premier

Mr Barnett shifted into pre-election mode, targeting the Labor Opposition on its union links and its political integrity.

He contrasted his own record in public office with the series of CCC investigations into Labor ministers during the Gallop and Carpenter governments.

"Integrity comes with leadership. It comes by way of example. I don't often talk about myself. All I would say, is that I have never been compromised in my political life," he said to applause.

"I have never traded favours. I have always put the position of the people of this state, of our government, of our party, first. And I will continue to do so."

Without naming Opposition Leader Mark McGowan, it was a statement that could have been interpreted as alluding to Mr Barnett's criticism of the relationship between Mr McGowan and property developer and Labor donor Nigel Satterley.

But it was also open to interpretation as a swipe at internal critics and potential leadership aspirants such as Transport Minister Dean Nalder, who was stripped of the finance portfolio over a conflict of interest issue, and who retains strong links and support from key business figures.

Money for Abrolhos, quadriplegic centre

In a media conference after his speech, Mr Barnett declined to narrow the scope for interpretation or explicitly state whom he was directing those remarks toward.

"You can assume what you want to. The record of the Liberal governments has been far, far superior to Labor, but there are temptations and there are pressures, and sometimes people make commitments they shouldn't," he said

"I have always governed to the best of my ability. I have always governed for all West Australians. And I have applied the highest levels of integrity."

During his speech, Mr Barnett announced a number of new projects including creating a national park around the Abrolhos Islands, a $30 million rebuild of the run down Quadriplegic Centre in Shenton Park, and $65 million to build a sealed road from Broome to Cape Leveque.

He also committed a Liberal government to introducing 9:00am opening times for Sunday shopping if the party won office next year, a pledge he also made at last year's state conference.