If you are shopping knife finishes and want something that reads material instead of mural, the Stained line (finish family aq_forced, display knife | Stained in many locales) is one of the older answers still sitting on market listings. Valve framed it like kitchen chemistry: acids and condiments on steel, leaving a patina that fights for attention with the blade shape—not with a full-wrap graphic.

What you are actually buying: uncommon rarity, wear 0.00–1.00, patina-style color bands that move as float climbs. Factory New can feel crisp and metallic at the edges; high float pushes the whole knife toward muted, oxidized storytelling. Because the silhouette stays relatively clean, the purchase decision is less “pattern index lottery” and more “does this green-brown rhythm match my play knife and gloves?”

Release context

2013-08-14 — The Arms Deal. The aq_forced finishes landed with the first wave of official knife skins. For collectors, that date is part of the pitch: early Valve knife coating, not a modern case chase.

Designer note

Valve original. Design priority is layered metal color and finish logic, not illustrated skins. Every legitimate market listing still maps back to that single official finish behavior.

Skin character (shop lens)

Official fiction: lemon juice and mustard on the surface → forced oxidation. In-game you get the familiar verdigris / patina mottling. As wear increases, bright–dark boundaries and overall hue slide together—do not assume a low-float screenshot tells you how Battle-Scarred will feel on your knife model.

You might think the blade looks messy—try a black light.

That flavor line is a real inspect homework assignment. Under normal lighting some Stained knives look noisy; under black light, contrast can reorganize. Spin the model in-game, especially spine and edge bevel transitions—wear often breaks the patina in ways market icons hide.

What to watch

1. Era + story: Arms Deal patina knife—not hype art, but oxidation lore that still sells the fantasy.
2. Full wear band: low float for display; high float if you want deliberate age. On C5GAME and Steam, filter the same knife model and same wear bucket before you compare price and how fast listings move.
3. Inspect > rarity tag: uncommon does not mean “safe blind buy.” Confirm pattern placement and how float eats the patina on your template.

导购结论

Worth it if you want a budget-friendly, history-heavy patina knife and you will inspect in-game (plus black light if you care about the easter egg). Skip or slow down if you need a loud pattern or strict float flex—Stained rewards taste matching, not flex math.

Expert muttering

Treat Stained like buying weathered metal, not a poster. Align knife type first (push, bayonet, etc.), then float. Thumbnail shoppers pay the “why does mine look different?” tax—five minutes in inspect saves that.