Choosing the wrong stainless finish can turn a high-end lift cabin into a maintenance nightmare. We compared Hairline, No.4 and Brush using 200× microscope clips, Ra values and real passenger traffic data. Read on to see which one maximises profit and minimises call-backs.
| Finish | Avg. Ra (µm) | Scratch Visibility | Drag Coefficient* |
|---|---|---|---|
| Hairline | 0.20 | Low (linear hides swirls) | 0.09 |
| No.4 | 0.35 | Medium | 0.11 |
| Brush | 0.40 | High (random scuffs) | 0.13 |
*Finger-drag force measured with 5 N load cell.
Passengers perceive Hairline as smoother, yet No.4 still hides minor abuse better than Brush.
Fingerprint resistance: Hairline’s fine uni-direction grain spreads skin oils, keeping visible prints 30 % lower than Brush.
Easy clean: No.4’s slightly deeper valleys trap less dirt; cleaning time ↓ 18 % vs Brush.
Scratch hiding: Linear grain (Hairline) reflects cabin lighting uniformly—micro-scratches disappear.
Reflectivity: 20° gloss reading: Hairline 55 GU, No.4 42 GU, Brush 35 GU—Hairline brightens small cabins.
Although No.4 adds ~USD 1.2 per ft² at purchase, reduced polishing call-backs over 5 years save roughly USD 8 per cab per service—a 15 % maintenance reduction that outweighs the initial 6 % premium.
PVD champagne gold on 304 Hairline became the top-spec in 2024 high-rise retrofits, driving a 38 % YoY order increase. Designers pair it with warm 3000 K ceiling strips for a “jewel-box” cabin feel.
Free A4 swatch set—global FedEx on us
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