That would be fun, Mike!
While I had my firewall out I saw that the woven silica fabric looked frayed around the edges-- loose fibers hanging out, etc. looking ratty. Joline is a quilter so I took a page out of her book and put a "binding" around the edges to give it a finished look. Somewhere along the line I had obtained a roll of a strange 3M product- a polyester adhesive tape with a coating of metallic gold! Just to check to see if it was a real gold film I checked it with an ohmmeter.
I applied the tape around the edges of the firewall, wrapping it around front & back. Since gold has an extremely high reflectivity in the infrared, it shouldn't get too hot from header radiant heat.
Regards, Neil Tucson, AZ