Federal Treasurer Joe Hockey wants Arthur Sinodinos to eventually return to the frontbench, saying the former assistant treasurer is "a man of great personal integrity".

Senator Sinodinos stood down in March after political pressure over dealings that have been investigated by the Independent Commission Against Corruption.

Arthur Sinodinos appears at ICAC last week. Credit:Cole Bennetts

He told the ICAC on Friday he did not accept "any responsibility" for the NSW Liberal Party accepting donations from prohibited donors via the federal Free Enterprise Foundation during the last state election campaign.

At the time, Senator Sinodinos was the chairman of the party's finance committee. He said he did not know that property developers, who have been banned from making political donations in NSW since January 2010, had donated to the campaign.