Another note of caution [especially if using modern water-based paints]: These can be quite translucent, and the colour of the undercoat is important.
I had the car wheels refurbished in 'Anthracite' but, to get the shade that I wanted, it was important to specify 'Anthracite over Black' … [ 'Anthracite over Grey' comes out looking much lighter.]
MichaelG.
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