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No broad category label can guarantee scratch prevention. Resistance depends on the specific material, film thickness, test conditions, installation and the type of damage. “Scratchproof” is not a realistic blanket promise for automotive finishes.
Different kinds of damage
Light marring may affect only the protective layer or clear coat. Abrasion is material loss from rubbing. A scratch can cut through one or more layers, while a stone impact delivers localized force that may chip paint. These are different failure modes and require different tests.
What testing can show
A standardized test can characterize performance under defined conditions, but its result applies to that method and sample. Ask for the method, load, abrasive, substrate, conditioning and rating. A fingernail demo or key swipe is not a controlled comparison and can damage the vehicle.
Set expectations
A protective layer may act sacrificially in some situations, but it cannot prevent every scratch or impact. A test result does not guarantee the same outcome on every panel or in every environment. Get written guidance about repair and maintenance.
Questions to ask
Ask what the product is tested to resist, what the limits are, and how damage is repaired. Be cautious of claims that use “scratch resistant” without describing the test or that promise paint can never be damaged.
Related questions
Does PPS protect against scratches?+
Resistance varies by product and test. No broad category can prevent every scratch; ask for documented methods and limitations.
Does PPS prevent stone chips?+
Do not assume so. Impact response is product-specific and should be supported by relevant test evidence.
References and further reading
- ASTM D3359 — Standard Test Methods for Rating Adhesion by Tape Test.
- ASTM D523 — Standard Test Method for Specular Gloss.
- ASTM G154 — Standard Practice for Operating Fluorescent Ultraviolet (UV) Lamp Apparatus for Exposure of Materials.
Consult the current published editions and confirm that a method is appropriate for the substrate and claim. Listing a standard does not imply that LIQVIX or any other product has been tested to it.
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