Does this require drilling or modification to the bumper itself?

No. This bolts to existing factory mounting points on the lower bumper. No drilling, no cutting, no permanent alterations.

Will this fit if I have factory sensors or fog light cutouts in my bumper?

This is the outer molding piece only—it wraps the bottom edge of the bumper. Sensors and cutouts sit higher and are not affected by this part. Verify your bumper configuration matches this right-side outer position before ordering.

Can I paint this before installation?

Paint after install. Installing a painted piece risks chipping at mounting points and makes final finish work cleaner. Sand, prime, and paint once it's bolted in place and aligned.