My rear passenger side fender is rusted pretty bad. I was going to just do soem fender trimming but the rust is not in the fender well as mush as it is on the outer sheet metal above the sheet metal above the fender well. i would just cut out the rust and weld a flat piece where the rust was but i was wanting to put my fenders back on so i would have to crimp the metal some how. has anyone done this? or had this issue?

 

pics would help explain...