How to Obtain Film Fabric and Polymer Coating?

These are advanced materials needed for crafting higher-level weapons and armor. You can get them from the following sources:

1. Secret (mysterious) chests from severely infected areas in Sand Castle, Charles Town, and Snow Highlands. These chests are usually surrounded by a bunch of powerful infected so getting them without the proper weapons and skills will be difficult. Nevertheless, if you're lucky, you just need to deal with one powerful infected like what's shown below.

2. Exchange Feats (points) by completing Stronghold Battles to purchase maps. Each map costs 400 feats. You can buy multiple maps. Use them to reveal the location of a chest and go there to loot them for a chance to get one of these advanced materials.

3. Random loot from Camp Munitions Box. This is sold by Tex Brandon if the private camp has reached Steam age.

4. Obtained as random drop from Mystic Creature reward chests

5. Purchased from other players in Trade City or Hope 101’s market (not recommended unless you’re desperate or has a lot of gold bars to spare)