unpaint
/(ˌ)ʌnˈpeɪnt/verb
1 [with object] To remove the paint from.
2 [with object] To remove or obliterate (a painted picture, design, etc.). Chiefly figurative.
Origin
Early 17th century; earliest use found in Randle Cotgrave (fl. 1587–?1630), lexicographer. From un- + paint.