Ok here is my problem. I have a 1990 mustang gt vert. on the passenger side where the door meets the front quarter panel on the inside is starting to rust really bad> I actually have a rot hole near the hinge that hangs the door. my question is , how hard is it to repair this type of damage? I s it actually worth saving is what I am getting to. From the outside of the car you would think that there is very little rust at all, but looks can be decieving...... Just wondering what you all thought. Thanks in advance....