Nose Panel and Lower Valance:
area can be rusty on the underside of the upper nose panel
without showing signs of rust from the top. Its also difficult
to see without taking the grilles off, but you can shine
a flashlight down inside the holes on the upper panel and
get a good idea of the area. This area isn't as common as
other areas for rust.
of the water and moisture that causes the problem in this
area comes from the topside, usually from being exposed
to rain. Some moisture can also enter from the front while
driving in the rain.
lower valance typically gets its moisture from the front
and may sit in areas that collect dirt and debris. Its important
to periodically check this area and keep in clean.