Industry Minister Christian Paradis is once again defending himself against allegations of ethical misconduct, just a week after being found to have breached conflict of interest rules.

In a letter sent Tuesday, Liberal MPs Marc Garneau and Scott Andrews alerted Conflict of Interest and Ethics Commissioner Mary Dawson to their latest concerns about the minister.

Their missive follows a CTV News report broadcast Monday, revealing Paradis had stayed at a hunting lodge owned by former Quebec Nordiques owner Marcel Aubut in 2009.

At the time, Aubut was lobbying Ottawa to help fund a $400-million arena in Quebec City. Paradis was then-minister of Public Works.

Paradis' office admitted today that Aubut did make a brief pitch for federal money.

NDP Leader Thomas Mulcair called the lodge stay a throwback to "1950s-style politics."

Paradis' office has confirmed that he spent two nights at the lodge, during which time he was part of a group that successfully hunted a moose. However, his office insisted that the minister took his own gear, including a sleeping bag, and supplied his own food.

"I went there in my own car. I drove my car, Mr. Speaker. I bought my own equipment," Paradis said while defending himself during question period Tuesday.

There are a host of rules intended to ensure that members of the government do not use their office to influence decisions in favour of private interests, including one that ministers are "not to accept any gift or benefit connected with their position that might reasonably be seen to compromise their personal judgment or integrity."

Aubut's spokesperson said on Monday that no business was discussed during the stay, and that Ottawa never contributed any money to the arena project anyway.

When the question was put to Prime Minister Stephen Harper during a press conference in Seoul, he said he was not aware of any impropriety.

"As far as the information I have, this was a private trip and there is no link I'm aware of to any government business," Harper said.

But in their letter to the ethics watchdog, Garneau and Andrews contend the minister may be in breach of no less than seven sections of MPs' conflict of interest guidelines.

"It is our contention that in his dealings with Mr. Aubut, Mr. Paradis may be in violation of all of these provisions of the Act and the Code," the letter states, promising to follow up with a more detailed call for a full investigation into the minister's conduct.

At the very least, the letter's authors say, Paradis should have disclosed the trip as a gift valued at more than $500.

Last week, Dawson said Paradis had indeed broken conflict of interest rules in 2009, when he helped set up a high-level meeting with senior bureaucrats for ex-Conservative MP Rahim Jaffer and a business partner.

Jaffer had a green technology consulting firm and was gauging interest in a project to install solar panels on federal buildings. He called and emailed political staff in the minister's office about the project and later called Paradis directly on his cellphone.

Documents released in 2010, obtained by The Canadian Press, showed that the minister's political staff pressed bureaucrats to meet Jaffer and business partner Patrick Glemaud.

In their letter regarding reports of Paradis' hunting lodge stay, Garneau and Andrews point to that ruling as evidence the outcome of an attempt to peddle influence should have no bearing on determining whether or not it was the right thing to do.

"As you have noted," the letter states, "it is immaterial whether or not an attempt to further the private interest of an individual was ultimately successful or not in determining whether or not the Act or the Code has been violated."

Dawson's ruling against Paradis last week marked the first time a sitting cabinet minister has been found in breach of the law.

Paradis has since resisted calls to resign.