Following our report last week that protesters had shown up in front of London’s National Portrait Gallery to complain about BP‘s sponsoring of the annual Portrait Prize, this week marked ever more heightened tensions, anger, and action at the Tate Britain, where a party directly celebrating BP’s involvement in the museum’s funding was in full bore. This resulted in not just more protests, but activists spilling “an oil-like substance” on both the interior and exterior of the building (the latter also got feathered). ArtInfo has collected a handful of quotes from both sides of the debate and the Guardian‘s Jonathan Jones has filed this op-ed that the museum is right to take BP’s money and that, in these rough financial times for arts organizations, “If they can get money from Satan himself, they should take it.” Here’s one of the protest groups in action: