A mural to promote responsible behaviour among young people in Newquay has been painted over.
Burger King said the mural on its wall "had to be repainted" after a request from the landlord of the building.
The organisation behind the mural, My A'th Kar Newquay, which means "I Love You Newquay" in Cornish, said young people behind the mural were "reeling" from the incident.
The owners of the Burger King building were unavailable for comment.
The mural was painted on the wall of the Burger King restaurant in Cliff Road, Newquay, in November by members of My A'th Kar Newquay, a voluntary project.
Organisers said the aim was to "encourage locals and visitors alike to treat Newquay with respect and to behave appropriately".
However it was painted over on Thursday.
Sarah Pym of the Real Ideas Organisation, which helped create My A'th Kar Newquay, said: "This project is all about these youngsters communicating the type of respect that they want people to show for Newquay, so these whitewashing actions couldn't be more ironic or appalling."
A Burger King spokesman said: "Burger King strives to take a supportive approach to the local community in Cornwall wherever possible.
"We can confirm that the wall of the restaurant on Cliff Road, Newquay, has unfortunately had to be repainted following a request from the landlord of the building.
"Burger King would like to express its support to the group My A'th Kar Newquay who created the mural in question, and is exploring ways that Burger King and the local franchisee can be involved in this worthwhile local community group in the future."