You can view the page at http://www.classiczcars.com/forums/content.php?161-Rain-Gutter-Drip-Rail-Removal-and-Installation

I polished the stainless on a buffing wheel when I had them off the car. Took about 10 minutes per side and they look like new chrome.

To add, on late S30's there were clips inside the drip rail (NLA) to hold the rail in place. These are probably rusted away, and if not there it does not stop you putting the drip rail on as described above.