Spray and restoration
Luminous RAL colours and why screens cannot show them
The five luminous RAL Classic shades glow because their pigments turn invisible light into colour. Here is why no screen can show them and how to paint them.
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Spray and restoration
Choosing a colour for a vintage bike frame restoration
Old bike frames wore their makers' own colours, not RAL. How to find the original shade, pick a RAL number a coater can use, and handle fluorescents and decals.
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