Plastidip works on pretty much everything, even chrome.

Plasti dip is ok,it's not strong.

Not strong? Well its not crash or scratch resistant. However it is weather proof. As well as pressure washer and scrub proof. As well as brushed car washs and winter road salt. Coats need to be thick enough to look glossy but not run. 5 coats of that and your golden. My buddy has had his rims plasti-dipped for 2 yrs in Buffalo weather with no issues or touch-ups.

Lots of E39 guys did it on "bimmerfest" and "bimmerforums"

FITZUNI, they "Plasti-Dip" the wheels too, so I think it's strong enough for the window trim.

i did painted my grill black..but with driving NY roads it gets scratch pretty well and had to paint them atleast 1x every 2 months...i plasti dip the grills and nets..and she gets washed 4x a week and no issues of peeling at all.....i research how strong they are and they are power wash,car wash proof,wind proof..

Why not just get the correct 4.8is front spoiler?

Not the OP but I have a facelift and am thinking of this mod too...it's a lot lower cost and less work than putting on the 4.8is front.

But if they cost the same I'd go 4.8is look, no doubt. :D

No 4.8is spoiler. It's the whole bumper and VERY expensive