A guy on the BMW e21 forums I frequent has posted pics of a bit of rust he needs to sort out. I will be following his progress carefully, but thought you guys would like to see what he's up to!
http://www.bmwe21.net/forum/viewtopic.php?p=36340#36340
http://www.bmwe21.net/forum/viewtopic.php?p=36340#36340