Esahlin: Hello, I looked at both panels you mentioned, other than the minor rust on the seam - its in great shape. I do like the galvanized coating on the original bumper support brace.
Hammered: Hello, I do have a siphon feed blaster, I have used black beauty before - but I feel its too abrasive. I went to a media blast company today and they suggested silica, which I purchased. I will pull the car out of the garage and blast those hard to get spots. I will be back on track next week and hope to get most of the prep work completed.
http://www.dawson-macdonald.com/product.html
Thanks,
Steve