Quick answer
Polished Bronze is crafted at Woodworking Workbench I or II, not at an Anvil. You need the Bronze Polishing technology, a connected Tool Rack, Building Mastery 5, and the following materials: 2 Bronze Details + 2 Sand + 1 Melted Fat → 2 Polished Bronze.
If the recipe is missing or locked, the usual causes are checking the wrong workstation, not connecting the Tool Rack, or not reaching the Distillation Cube yet — which is the early source of Melted Fat.
Why Polished Bronze is so easy to miss
The name sounds like an obvious Smithing material, so the natural thing to do is open the Anvil and look beside Bronze Detail.
GK2 treats the polishing process as Building/woodworking production, though. The metal material is therefore made at a Woodworking Workbench.
This is one of those recipes where the game's branch logic matters more than the real-world logic of the item's name.
What you need to unlock
The main technology is Bronze Polishing.
That unlocks the recipe itself, but the technology alone is not enough. The workstation still checks its extension and Mastery requirements.
The complete minimum setup is:
Bronze Polishing;
Woodworking Workbench I or II;
Tool Rack connected to that Workbench;
Building Mastery 5;
2 Bronze Details;
2 Sand;
1 Melted Fat.
The craft produces 2 Polished Bronze.
Where exactly is Polished Bronze crafted?
At either:
Woodworking Workbench I;
Woodworking Workbench II.
You do not need Workbench II for your first batch.
That matters because Woodworking Workbench II itself uses Polished Bronze as a construction material. If the recipe required tier II, the progression would genuinely deadlock. It does not — use Workbench I.
Why the Tool Rack matters
Polished Bronze is one of the recipes that requires a workstation extension.
For the Woodworking Workbench, that extension is the Tool Rack.
Like the Hardening Bucket on an Anvil, the extension must actually belong to the workstation. Simply building one somewhere nearby may not satisfy the recipe.
If the technology is unlocked, your Mastery is high enough, and the materials are present but the recipe remains greyed out, reposition the Tool Rack directly against the Workbench and reopen the interface.
Polished Bronze recipe
One batch uses:
2 Bronze Details;
2 Sand;
1 Melted Fat;
→ 2 Polished Bronze.
Requirement: Building Mastery 5.
It is usually worth making several batches once the chain is operational because Polished Bronze quickly appears in important buildings and gear.
How to get Bronze Detail
Bronze Detail is made at an Anvil from Bronze Ingot, but it requires:
Bronze Craft;
Hardening Bucket;
Smithing Mastery 2.
One Bronze Ingot produces six Bronze Details, so once your Smithing setup works, this ingredient is not especially expensive.
If it is still locked, use Bronze Detail Not Crafting.
How to get Sand
Sand appears in several early production chains and becomes a good automation target later.
For your first Polished Bronze, you do not need a special version of Sand — just normal Sand available to the Workbench.
Once zombie automation is online, maintaining a dedicated Sand supply is useful because it also feeds glass, stone, and alchemy-adjacent production.
How to get Melted Fat
This is the real bottleneck for many players.
Melted Fat is produced in the Distillation Cube. One basic distillation route processes Fat together with Clay Plates and Fuel and produces multiple Melted Fat.
The Distillation Cube belongs to alchemy progression, so Polished Bronze effectively connects metallurgy, woodworking, and alchemy.
If everything except Melted Fat is ready, do not search for another hidden Polished Bronze workstation. Advance the story/alchemy chain until Distillation is available.
See Alchemy Guide.
How to reach Building Mastery 5
This is the second common blocker after Melted Fat.
Building Mastery is a sum of talents and equipment. For Building, Axe and Pickaxe are particularly important.
A Bronze Axe and Bronze Pickaxe together provide a major boost and, combined with the early talent node, commonly reach the early Mastery 5 threshold.
If you are one or two points short, inspect your toolbar before waiting another week for Faith.
See Mastery Explained.
The recipe is completely missing
If Polished Bronze does not appear in the Workbench list at all, check Bronze Polishing.
If the recipe is visible but locked or grey:
check the Tool Rack;
check Building Mastery;
check ingredients;
make sure you are using the correct Workbench.
That distinction is useful: “recipe absent” usually points to technology progression, while “recipe visible but cannot start” points to workstation requirements or Mastery.
Can you buy Polished Bronze?
Yes. Once the Town is developed, several shops can stock it, including:
Furniture Maker;
Jeweler;
Smithy.
Buying one or two can be a useful emergency shortcut when the Town is already online.
For early progression, however, building your own chain is still better. You need Polished Bronze repeatedly, and the same production path unlocks other useful materials.
What is Polished Bronze used for?
It appears in several important mid-game unlocks.
Notable early uses include:
Writing Desk;
Woodworking Workbench II;
Furnace II;
weaving/sewing progression;
formulation and embalming equipment;
Bronze tools;
bridges, mechanisms, and upgrades.
It is not a one-off quest component. Once you unlock production, keeping a small reserve is useful.
Why the Writing Desk matters
The Writing Desk is one of the main reasons players start searching for Polished Bronze.
It leads into the next writing/paper progression layer and eventually supports stronger church-related production and sermon systems.
In that sense, Polished Bronze is a bridge between early crafting and later Faith/church progression.
Do I need a Laboratory for Polished Bronze?
The Polished Bronze recipe itself is not made in a Laboratory.
However, Melted Fat comes from the Distillation Cube, which belongs to alchemy progression. That is why older demo discussions could make the material seem impossible to obtain — parts of the full chain were not available in the same way.
FAQ
Where do I craft Polished Bronze?
At Woodworking Workbench I or II with a connected Tool Rack.
What is the recipe?
2 Bronze Details + 2 Sand + 1 Melted Fat → 2 Polished Bronze.
What Mastery is required?
Building Mastery 5.
Do I need Woodworking Workbench II?
No. Workbench I is enough for the first batch.
Where do I get Melted Fat?
Produce it in the Distillation Cube, or later buy it through the appropriate Town trade route.
Why isn't it on the Anvil?
Because the recipe belongs to the Woodworking Workbench despite the metal name.
Can I buy finished Polished Bronze?
Yes, several Town shops can stock it after they are built.