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coating 9H Archives - DetailingWiki, the free wiki for detailers

Miscellaneous detailing related content

What is the Pencil Scale

The pencil scale is a test of hardness that gives an impression on how hard a certain coating is. The test is done by pressing a pencil with a certain hardness firmly on the surface on a 45 degrees angle. The highest grade that does not make permantently mark the surface is the score for the pencil scale.

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