To POR15 or Not

Everything has it's place where it works really well, but POR15 wouldn't be my choice as an underside coating.
Better off to paint it body color or use a good thick nasty something. :D

A member here told me one time that his Father used to say that the best metal on the car is the metal coated with grease and oil.:D
Not that I recommending grease and oil literally of course.