From another site....
I'd keep an eye on yours.
Front tow hooks rusting after 3 weeks? - Diesel Forum - TheDieselStop.com

 

I test drove an F-350 2 months ago with 28 miles on it and the tow hooks already had spots of rust...... Going to be watching them when I get my truck.

 

Mine are showing a bit of surface bleed from the bolts onto the hook. After Dec, Jan, Feb and March winter roads, salt, sand, rocks, and calcium Chloride. Just a quick buff with proper chrome polish will be a no problem.

Interestingly my tube steps are showing some marks as is the grill i cant easily clean up without hitting it with some elbow grease. Damn Calcium Chloride and salt I guess. Going to bring this up first trip to the dealer.

 

I have used this stuff on my boats with very good results.....