I have a few metal panels on the front side of my barn that the previous owner had put dirt/sod up a few inches. The moisture and acidity of the soil has rusted the panels in a few spots. I was wondering if anyone has ever tried to spray truck bed liner plastic on metal panels before? I am planing on masking off the bottom 4 inches, sanding, and then coating the panel bottoms with about an 1/8" of bedliner. In the future, when I pour a pad in front of the two main doors, I will be laying felt up against this 'liner' before I pour up against the siding. What 'cha think ?