1992 Ford F350 windshield leak fix

Put the new window in at night and next day rain had water lines inside the window when driving. Safelite pulled the old but wouldn’t put the new in due to rust. It was about 8in in total and cleaned up easy with a wire brush. No bubbling, pinholes or flaking from rust. Thankful they left the new windshield and I had 3M window adhesive and primer.