Fiberglass is a reinforced plastic mainly used in crafting protective suits and weapons of Fallout 76. It comes in scraps, bulks, and spools and can be extracted from junk materials. But as an uncommon item, Fiberglass is somewhat tricky to farm. Players will first look for things containing Fiberglass and then scrap those to get Fiberglass. This guide, however, simplifies the farming process and explains where to look for the most lucrative Fiberglass deposits in Appalachia.