President Donald Trump declared China the "grand champions" of currency manipulation on Thursday, just hours after his new Treasury secretary pledged a more methodical approach to analysing Beijing's foreign exchange practices.

It doesn't take long to appreciate that Magdi Batato has one of the biggest private sector jobs in the world.

Australia's peak body for the painting industry has expressed concerns for tradespeople who have been issued qualifications to handle toxic materials without the requisite training.

Industry heads cite global factors for surge; see the currency reaching $US2000 by the end of the year.

"I didn't even realise that was such a problem for these young girls."