Long story short, I went over a driveway curb and didn't expect a drop on the other side. Wheel went down and scraped about a foot of the underside frame behind the wheel.

 

 

Good news is that I got the car out without damaging anything else except the metal outer frame of the car and the plastic edge. Not much to do with the plastic but the metal part is skimmed clean of paint and is shiny exposed metal. It's not visible unless you go looking for it but I don't want to let it rust.

 

 

My thinking was to clean it up and apply a coating of something, paint or anti-corrosion stuff. Just not sure what to get. Was going to pop down to super cheap auto or repco and ask for paint but thought to post here for advice.