ARC Synthetic Resin is a Rare item that you can find by defeating ARCs that wander around the map. As a Rare item, don't always expect to find it on any of the smaller enemies, like the Wasps, ...

A Reveal in Ruins is a quest from Lance in ARC Raiders that requires you to retrieve an ESR Analyzer. This device can be found at a pharmacy in the Buried City, but getting it is easier said than done ...