For about a decade the Jeep Grand Cherokee has had issues with the front hood corroding where it meets the underside, even into the 2019 year, not sure if its ever been fixed.
What happens is the aluminum hood corrodes where it meets the front underside which is right along the front edge of the hood. (not all vehicles are affected, just poor manufacturing/sealing of the metals. (an easy internet search reveals the same)
Jeep at the body shops discretion either repairs it or replaces the hood. If you ever, lets say, at a car lot like CarMax, look at the front edges of the Jeeps, you WILL find at least one describing what I am talking about.
I bought a 2017 Jeep Grand Cherokee Limited with 24000 miles on it from Carvana just this past spring. After it was delivered I learned of noticed this issue on the truck. Confirmed it with the dealer and it would be repaired free but forget that, dont want a repainted or replaced hood so I called up Carvana, they picked it up and refunded my money.
Moved on and bought a 2017 Traverse from a dealer locally, Certified, 1 year 12 mile warranty and 100,000 poor train, awesome SUV with the 5200 lb factory tow, 20 inch tires for less money.