Darrin:
Depending on what alloy you plan to use you can bend to a very tight radius without cracks. I would think that scoring the panel might cause a split, and ruin your job in the long run.
If you are using alloy such as 6061 sheet you may need to go to a radius of 2 or 3 times the thickness to get a crack free bend....5052 0r 3003 will bend almost zero radius crack free.
Do a test bend on some stuff before you make up a whole panel and you will be fine.
Cheers
Phil