it is also a way to see if there is enough paint to polish... is not fool proof as the paint may be thick and the clear really thin but it helps you gauge that... for example if the paint is ready 50um changes are good you are very near to burning through the clear.... so its just another way to make sure you dont burn through the clear
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Achieving life is not the equivalent of avoiding death.
Ayn Rand
I swear by my life, and my love of it, that I will never live for the sake of another man, nor ask another man to live for mine.
atlas shrugged
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