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Please provide the guaranteed data for color retention and chalk resistance (e.g., maximum chalk level per ASTM D4214) of PVDF-coated AlMgMn panels (AA3004/AA3005 series) in coastal, high-salinity environments over a 10-year warranty period.

In coastal high-salinity environments, premium PVDF-coated aluminum-magnesium-manganese panels exhibit the following typical performance characteristics within a 10-year warranty period:
Color change: ΔE ≤ 3.0 (no significant visual difference).
Chalking rating: ≤ Grade 2 (minor chalking, no noticeable white powder when rubbed by hand).
Protective Measures: Dual-layer fluorocarbon coating, annual clean water rinsing, and use of marine-grade substrate.
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