From Longman Dictionary of Contemporary Englishwar paintˈwar paint noun [uncountable] 1 SApaint that some tribes put on their bodies and faces before going to war2 DCBmake-up(1) – used humorously Josie’s just putting on her war paint.
Examples from the Corpus
war paint• Forest Goblins wear exotic war paint, carry war axes and are often decorated with colourful feathers.• When the fans meet their idols, apply their war paint and barrack the opposition. 