General finishing reference (1999). Product instructions and current project conditions take precedence; no service-life figures are adopted.
Specialist resource
Sources & editorial standards
Reviewed September 13, 2026. Sources retain their product, jurisdiction and edition limits. Our original workflows help organize decisions; they do not certify an assembly or supplied material.
Surface weathering research (2020), not a forecast for a supplied board or a structural assessment.
Corrections and commercial relationship
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