My boys went to Challenger Learning Center to attend the "space camp" and these were the photos I was blessed enough to get from the workers.
I used a plain light grey background and then sprayed it with the metallic mist... both gold and silver. Also used real duct tape as a frame and on the smaller photos as well. I know the duct tape is NOT archival safe... but what the heck, not everything has to last forever does it? ;)