Labor has used the victim of a failed mortgage scheme in a Queensland state election ad attacking Liberal National Party deputy leader Mark McArdle.

Mr McArdle was a partner in Sunshine Coast law firm Boyce Garrick when mostly elderly investors lost around $30 million in the 1990s.

He was named as a defendant in at least five class actions.

The scheme led to his partner, former Boyce Garrick principal Terry Boyce, being struck off the solicitors’ roll in 2003.

Joyce Baker, 73, lost $60,000 in the scheme but recovered it through legal action.

In the ad, Mrs Baker calls on LNP Leader Lawrence Springborg to reconsider Mr McArdle as his deputy.

“Lawrence, you have got to think real hard about who you put in there as your deputy premier,” she says.

“My life’s ruined.”

The ad ends with the words: “Now’s not the time to risk Springborg.”

Mr McArdle told state parliament in 2008 he would have run the scheme differently if he had his time over.

“Not a day goes by that I don’t have an enormous sense of pain for what happened to those men and women,” Mr McArdle said at the time.

But he told parliament the matters had been investigated by the Queensland Law Society and he had been exonerated from “any activity that could be called improper”.

AAP