Do these require any drilling or permanent modification?

No. They mount directly over your factory handles using the existing attachment points. Once installed, they can be removed without leaving marks or damage.

Will the chrome finish hold up to weather and UV?

ABS resists fading and cracking far better than painted plastic or soft rubber trim. It won't peel or bubble in sunlight or freeze-thaw cycles, though normal car washes will keep the shine brightest.

Do I need primer or paint before installation?

These arrive finished and ready to bolt on—no prep work needed. Install straight out of the box.