[m22mike]

I am glad I posted the picture now. There does seem to be a brown stripe there, guess I did not consider that on first inspection.
On this car everything on the undercarriage had been "chassis blacked". The only way I even suspected that there were stripes there is because there was a smooth spot that had not been effected by rust.
So, I got out the 600 and started wet sanding, The best I could do was what you see in the picture.

Mike