Hi Dawa, thanks for the reply. We have a good amount of rust going on in there and really in a lot of places. It's my bf's truck (orig owner 2), I'll pass your message along, thanks for the comment. I don't know exactly what he means when he says the battery box (or shelf?), but the rust is the major issue. It's been a Washington truck all of it's life, the great NW & rain. They are not so kind to metal!