The resistance of an ABS shower tray surface to scratches, stains, and discoloration over time can vary based on several factors, including the quality of the ABS material, any additional surface treatments applied, and the conditions of use.

Scratch Resistance:
ABS is generally resistant to minor scratches, but it may not be as scratch-resistant as harder materials like stone resin or ceramic. The level of scratch resistance can be enhanced if the ABS surface is treated with a protective coating. However, sharp objects or abrasive cleaning materials can still cause scratches.

Stain Resistance:
ABS surfaces are typically resistant to most common stains, particularly when the surface is smooth and non-porous. However, exposure to certain chemicals or prolonged contact with strongly colored substances (e.g., hair dyes, some toiletries) could potentially cause staining if not cleaned promptly. The stain resistance is generally good, but it’s important to clean the tray regularly to maintain its appearance.

Discoloration Resistance:
ABS has good resistance to discoloration, particularly if it is UV stabilized. Over time, however, prolonged exposure to direct sunlight or harsh chemicals can lead to yellowing or fading, especially if the tray is not adequately protected. High-quality ABS materials and surface treatments can significantly reduce the risk of discoloration.

Factors Influencing Resistance:
Quality of the ABS Material: Higher-grade ABS is more likely to resist scratches, stains, and discoloration.
Surface Finish: A glossy finish might be more prone to showing scratches, while a matte finish could be more forgiving.
Maintenance: Regular cleaning with non-abrasive cleaners will help preserve the surface and prevent the buildup of substances that could cause damage.

While an ABS shower tray is generally resistant to scratches, stains, and discoloration, its performance will depend on the material's quality and how well it is maintained over time.