odd, I used the 3M 1080 brushed aluminum vinyl and it still shows through, but its quite thin (but VERRRRY stretchy and strong without deforming the deign magically).
either way, I'd say sand,

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I swear, my cars are like a girlfriend.
Sometimes its a rough ride, sometimes its smooth motorin'.
Sometimes she doesnt like how i treat her and sometimes i dont like how she behaves.
BUT at the end of the day, she loves it when I am inside her.

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'91 850i
'05 X5 4.4i
'09 Clubman S