Had accident...question on replacement body panels

[ACEMAN]

Sad to say but a car drifted into my lane causing me to swerve and hit a telephone pole and a stone wall. Body shop has ordered the replacement body panels that I need. I noticed that the seemingly bare metal where the paint flaked off hasn't rusted yet (after a week with salty roads). I'm wondering if Nissan dips these bodies into an anti-corrosive bath prior to painting. Can anybody confirm this? Also, when I get the replacement OEM fender and door skins will they be treated? My guess is they won't be. Is there a means of treating them before the body shop paints and installs them? I just want the replacement parts to wear, look, and last as well as the rest of the vehicle.

Thanks in advance for any information.

[4x4creature]

If they in fact OEM parts from the factory, then the metal that was used to stamp out the fenders, etc..etc...will be to the same standards as a new car/truck.....the metal itself is treated before it gets painted...but the body parts have to be prepped before painting...

[ACEMAN]

Thanks for the response.

Any other opinions on whether I need special corrosion protection beyond priming and painting the exterior side of the panels? Despite being OEM panels, if the body is dipped after assembly, individual replacement panels won't be treated.