JOIN USClegg got paint on his face and his jacket outside a question and answer session, Sky News reported.
A man in his 20s has been arrested in connection with the incident. Scottish Liberal Democrat leader Willie Rennie and police officers were also hit with the paint, which was thrown as the politicians left their car to walk up the steps to the venue.
"A chap threw the paint. These things happen, it's no big deal," Clegg said.
A spokesman for Clegg said he was uninjured and carried on with his day. "Nick's got three children under 10, he's not worried about a bit of paint," he said.
A witness said: "He (Clegg) laughed it off. He said these things tend to happen sometimes in the job and it's no big deal. He took it in good humour. People rushed to his aid to wipe it off, there were still traces of the blue paint on his clothing."