Topic: restoring the belly?

[CanadianFoxMustang]

Looking at my 89 which is pretty much mint... I think I'd have to redo how I did my 87. I believe Ford had it all on zinc primer or something and the only color on the bottom is due to overspray. Just not sure if the gravel guard stuff (in rear fender wells) were added first? Anyone have more pics of a black fox's underside to share? Thanks