Do these mount at factory rocker points?

Yes — they use existing factory bolt holes. No drilling or bracket fabrication needed. Just unbolt the old lights and bolt these on.

Will these work with my truck's original wiring?

They're designed for plug-compatible installation with stock electrical. If your harness is intact, you're ready to go. If your wiring is damaged or modified, test before final assembly.

Do I need to paint these before installing?

Black finish ships ready to bolt on. Paint is not required unless you prefer a different color match.