The influence of propylene glycol phenyl ether on the film properties and application process were discussed, and compared to the original paint.

初步探讨了丙二醇苯基醚对漆膜性能、施工性的影响，并与原漆进行了比较。

youdao

"Living pigments" is a metaphorical device to refer to the fact that the pigments of the original paint have been replaced by pigmented micro-organisms.

“活颜料”是个比喻，意味着绘制岩画最初使用的颜料已被画作表面微生物取代。

youdao

The objective is to remove partially (NOT COMPLETELY) the original paint. By using sand paper, the dark brown will be removed and you'll see a lighter paint appear.

这一步的目的就是要清除一些原色（不是全部），用砂纸磨过后，深褐色就会消失，浅褐色就会显现出来。

youdao

But atoms from the original paint were also found in the varnish, which may therefore be left in place.

BBC: Van Gogh's Flowers In A Blue Vase damage seen in X-rays

The car still has the same engine but has since been fully restored, with the original paint returned to its skin and a complete overhaul of the engine.

FORBES: Vehicles Feature

The purpose was to determine not only what was in the samples in terms of atoms and molecules, but also the precise structures in the interface layer between the original paint and the varnish.

BBC: Van Gogh's Flowers In A Blue Vase damage seen in X-rays