Regarding ABS personally I would advise to go to FISD and RPF and read the threads where they discussed about fiberglass and ABS. You might find out that the ABS is not the same that was used when SW was released, it evolved a lot during the years. It SURELY doesn't have a 5-10 years shelf life, just look at the old screen used ABS SW helmets, they are still ok today. Yellowed, maybe, but no other problems with them, just read CfO or RS threads. No SW licensee nor fan creator ever made a fiberglass armor exactly because of its fragility and brittleness, and not just because of price. Rubies and Museum Replicas also made ABS armors.
It is not easy to take photos of a big black shiny thing. I'd advise to use as much natural light as possible and go without flash.