I agree, Frank. I have always applied filler to bare metal and never had a problem. If I remember right, that is the way the body work books that I read some 30 years ago said to do it. I am not saying that with all the improvements in products that it can't be done differently, but if something works, why change?
I have never had a situation such as this before, so I was just wondering if filler was the way to go.
I finally got all the old filler off of one fender. It was at least an 1/8" thick in some areas. Now I can start spreading it back on, but only enough to fill all the scratches and a few minor dents.
