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Old 28-05-2018, 03:50 PM   #6
OCD Sufferer (Obsessive Car Detailer)
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You're having problems for 2 reasons:

When a paint is sprayed a very thin layer is applied, the metallic particles in the paint all 'sit' correctly on the surface and like tiny mirrors they reflect the light to make it look silver/glittery.
If you use that exact same paint to touch-in, no-matter how careful you are, you apply it as a thicker layer. The metallic particles sink, don't reflect the light and the paint appears much, much darker and dull.

If by luck there were any metallic particles doing their job properly then by sanding the paint they will get damaged, and once again can't reflect the light.
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