One Nation's West Australian Senate hopeful Rod Culleton has struggled to defend or explain some of the party's key policies in his first sit-down interview since the election.

West Australians are set to find out the final results of the Senate count on Monday morning, and One Nation is widely tipped to take the state's 11th seat.

But in his first sit-down interview since the election, the party's number one candidate was shaky on his party's policies, including why there should be a ban on Muslim immigration.

"I'm not going to do politics on the run, and that's only one of many of our policies," he told 7.30.

"I come to One Nation with strengths in agriculture, banking and other policies and I don't want to be a jack of all trades and a master of none. So I won't do politics on the run."

When asked about the party's stated position that multiculturalism had failed, Mr Culleton again said he would not "do politics on the run".

"I wouldn't say it's failed, I respect multiculturalism.

"I've married a very beautiful Greek woman. Her family love me like a son, and I especially enjoy Greek Easter."

On the party's proposal to ban the burka, Mr Culleton said it was about respect.

"I tend to think Muslim women would be very attractive women, I mean, why do they have to hide their face?" he said.

"I just think, 'Why hide your identity?' I'm very happy to put my face into the public... and I think that's how we should, for the respect of others as well."

He also refused to answer questions on banning Muslim immigration, saying he was not going to "do policy on the run".

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Candidate may be ineligible due to alleged theft of a tow truck key

Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. Watch Duration: 7 minutes 37 seconds 7 m Likely WA One Nation senator struggles to explain party policies

Even if Mr Culleton wins, there is doubt about whether he will be able to take his seat in the Senate.

He may be deemed ineligible due to a conviction in NSW over the alleged theft of a tow truck key during an altercation with its driver.

He is also due to face a four-day trial in Perth Magistrates Court in August over allegations he stole a $27,000 hire car last year.

The alleged theft happened during a heated clash when he was trying to stop receivers repossessing a friend's farm.

Mr Culleton said he was convicted over the NSW charge in his absence because he was on bail for the WA charge.

"I notified the court and said 'I can appear by phone and I'm ready to go' and the magistrate never rang me and convicted me in my absence," he said.

"And it was at that point I said 'Nup, I'm going to stand for politics, this is out of control'."

He claims he was approached by several parties to run but chose One Nation because he thought most other politicians were "tossers".

"They need to get into the grassroots, these guys need to get a bit of dirt under their fingernails and experience the real world," he said.

"I often question whether these guys can actually change a spare tyre on their car, and yet they're running the country."

Brother-in-law or wife could take the seat if Culleton ruled out

Rod and Ioanna Culleton, no. 1 and no. 3 Western Australian One Nation senate candidates. ( Robert Koenig-Luck )

The most likely outcome if Mr Culleton is deemed ineligible is that the seat will go to the number two or three candidates on the One Nation ticket — his brother-in-law Peter Georgiou — or his wife Ioanna Culleton.

Ioanna Culleton told 7.30 she too disputed the party line that multiculturalism had failed, disagreed with its proposed ban on Muslim immigration, and admitted a number of the party's policies didn't sit comfortably with her.

"I will argue the point if I'm in," she said.

"For me, it'd be just an interim seat until Rodney gets back in but I would definitely argue with those because they don't sit comfortably with me."

Both candidates want a royal commission into the banks and a moratorium on farm closures, after their farm in Williams, southeast of Perth, was foreclosed three years ago.

They now help other farmers facing issues with their lenders.

If Mr Culleton is deemed ineligible, he has vowed to work in the background with whoever takes the seat.

"It was about the horse running on the day, we call the horse Red Caviar and I was the jockey on the horse and it looks like we're going to run it home," he said.

"If they have to get another jockey for the horse well I'll certainly be in the background … I'm not going to go away."

"I'm going to pursue a life of common sense and real down-to-earth politics."