Nigel Farage was reportedly stuck on his Brexit Party campaign bus due to people nearby wearing balaclavas thought to have been armed with milkshakes.
Police are said to have been called to the scene in Rochester.
But later a Brexit Party spokesman confirmed that Mr Farage had left the bus after police spoke to the protesters.
Earlier this week the Brexit Party leader was doused in the milk-based drink while campaigning in Newcastle.
Today Mr Farage has been campaigning in Kent on a bus driven by Michael Botton, reports Kent Live.
Mr Botton told Kent Live: "There are a couple of guys standing over there with milkshakes, they were going to throw them over him.
“But the police are there, we’ve spotted them and now Nigel isn’t getting off the bus.”
Three young men dressed in black with their hoods up and covering their faces with balaclavas were spotted at the back of the crowd.
Farage was said to be alerted and he was told not to get off the bus.
And two men enjoying iced coffees were photographed speaking to police liaison officers after they had shouted anti-Farage slogans.
A Brexit Party spokesman said: "Nigel Farage arrived at Rochester to be greeted by 50-60 local supporters.
"Three anti-Brexit party activists turned up with milkshakes, they were laughed at and spoken to by the police and put their drinks down.
"Farage conducted a few interviews on the open topped bus then came down to speak to supporters and local campaigners."
Mr Farage did not walk down streets as he had at previous stops.
Kent Live reporter at the scene Will Rider said: "He was stuck on the bus for ages and wouldn't come off.
"Eventually he did come off but he only stepped about a metre away and chatted to some supporters.
"He got back on the bus very quickly.
"In all the other places he stopped off and walked down the high street.
"There was a Brexit stall on this high street but he didn't visit it.
"He's gone and everyone has left now."
On the last day of campaigning he said: "It's a big day tomorrow, a chance to stun the establishment.
"I don't know if the opinion polls are right but if they are the Brexit Party could win and it could win big. It could change the whole political agenda, I reckon that's pretty exciting."
Mr Farage, whose Brexit Party have seen huge success in polling ahead of the voting tomorrow, said: "...militant Remainers who do not hide their contempt for the demos – the people – and imagine that they can stop the march of a mass movement with a milkshake. Dream on."
Mr Farage has been on the streets earlier today to meet voters ahead of the European elections taking place tomorrow.
He is said to have largely received a positive reception in Dartford and Gravesend.
Paul Crowther, 32, has been charged with common assault and criminal damage after being filmed throwing the drink over Farage.
Crowther, who works as a customer service representative at Sky, will appear at North Tyneside Magistrates Court on June 18.
Former EDL leader Tommy Robinson and UKIP candidate Carl Benjamin were both targeted with milkshakes in recent weeks with Robinson being doused twice in two days.