When sourcing ACP for facades, the total panel thickness should ideally be 4mm or 6mm, with an aluminum skin thickness of at least 0.50mm to ensure structural integrity against wind loads. For exterior applications, prioritize PVDF (Polyvinylidene Fluoride) coating over PE (Polyester), as PVDF offers superior UV resistance and color retention for 15-20 years. Additionally, verify the core material type, choosing between LDPE (Low-Density Polyethylene) or fire-rated mineral cores depending on your project's safety requirements.