From Wiktionary, the free dictionary
whore's paint (uncountable)
- (vulgar, derogatory) Excessive, gaudy, or tasteless makeup.
1960, Pietro Di Donato, Three Circles of Light, Messner, page 238:See — there is rouge and whore's paint on thy white starched and pleated shirt!
1983, Cathy Cash Spellman, So Many Partings, Delacorte Press, →ISBN, page 164:'Twas the whore's paint that fooled me, thought Tom. She's no more than twenty-two [...]
1991, Jane Feather, The Eagle and the Dove, HarperCollins, →ISBN, page 48:I will not have that . . . that whore's paint on my face!"