5 yrs ago I looked at a silver '03 4.6is with the F&R splitter/diffuser/spoiler (don't know actual names), refinished in satin black. The painted surfaces matched the color & shine of the surrounding lower plastic item.

If I can find a set (at a reasonable price), I will P/U and refinish in satin black. Much better cohesive look IMHO. The painted pcs look too "boy racer" for me!

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'03 X5 4.4 Sport, last of the M62s (8-03 build date)
I believe in deadication to craftmanship in a world of mediocrity!