400 Years Ago a Prudish Aristocrat Censored This Artemisia Gentileschi Nude. Using Tech, an Italian Museum Has Revealed the Stunning Original Work
https://news.artnet.com/art-world/censored-artemisia-gentileschi-female-nude-revealed-2375778
https://en.wikipedia.org/wiki/Allegory_of_Inclination
Her other work is also well worth a look:
Glaze! That's the word I couldn't remember earlier.
Eh, wash & glaze are kinda the same from our perspective as viewers - just differentiates type of solvent used, as determined by binding media.
Yeah, it only really matters with oils... need to go fat/thick over lean/thin otherwise the paint layers tenses and cracks off. Great fun