Unwig

Painter. Sir, ’Squire Lumpkin, the little, round, fine gentleman, employ’d me to paint white wigs, upon all the pictures, at half-a-crown a head. […] Tony. Can you unwig ’em again?

Source: wiktionary

[…] I remember well that one of his jests on this occasion was pinning the wig of His Grace the Lord Archbishop of Canterbury to the wig of that right reverend Father in God, the Lord Bishop of London, as these two holy men sat discussing the question of a pension on the Irish establishment, for one of the King’s cast-off mistresses; and when they rose and moved in opposite directions great was their dismay at finding that they unwigged each other.

Source: wiktionary

I was unwigging myself, wiping off the white from my chubby boy’s face, easing myself out of bodice and fardingale.

Source: wiktionary

1844, Charles Waterton, “The Wren, the Hedge-Sparrow, and the Robin” in Essays on Natural History, Chiefly Ornithology, Second Series, London: Longman, Brown, Green, & Longmans, p. 96, […] only the other day, in Dublin, a high dignitary of the law did exhibit such palpable partiality in a cause of “Victoria versus Repeal,” that he ought to have been unwigged there and then, and banished for ever from that arena of marked injustice to poor ould Ireland, and her patriot sons.

Source: wiktionary