закрашенные самим художником детали, проступающие позднее на рентгенограмме или вследствие шелушения

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Note added at 6 mins (2006-11-05 23:13:36 GMT)
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# (plural pentimenti). Alteration made by the artist to an area already painted. A left-visible correction, sometimes referred to as the shadow of the line.
www.portjacksonpress.com.au/pjpglossary.php

# Derived from the Italian meaning "repentance." Pentimenti are the changes in composition which a painter makes while producing a painting. These alterations are often visible in the infra-red, in x-rays, and sometimes to the naked eye.
art.abbottpages.com/glossary.html

# the reappearance in a painting of an underlying image that had been painted over (usually when the later painting becomes transparent with age)
wordnet.princeton.edu/perl/webwn

# In painting, pentimento is the growing transparency in paints with age causing underlying elements to show through. This can often show the original artists underpainting or show signs that the painting was later altered.
en.wikipedia.org/wiki/Pentimento

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Note added at 8 mins (2006-11-05 23:15:13 GMT)
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http://en.wikipedia.org/wiki/Pentimento

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Note added at 9 mins (2006-11-05 23:16:37 GMT)
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То была ошибка Ивана Готта. Краски были смешаны неверно. Произошел эффект, называемый в живописи пентименто, когда старое, записанное изображение проступает на новом слое, губя работу. Так погиб Никита Матвеенко.

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Note added at 11 mins (2006-11-05 23:18:08 GMT)
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....И когда в мастерскую поступила сложная работа по снятию пентименто с ценного средневекового полотна, ответственная и престижная работа, которая позволила бы....