What if.... you have two products being purchased for a project: 1) a zero-VOC paint, and 2) an anti-rust additive with 550 VOC g/l that is mixed in with paint after purchase. How would you document these products? Separately? In combination? Independently, the paint is clearly compliant, however, the anti-rust additive is not. The resulting combo anti-rust paint that is produced onsite and ultimately the substance that is applied to the project may or may not be VOC compliant; this would require testing I'm assuming.

Separately, the additive itself does not exactly qualify as a paint or a coating (or adhesive or sealant, or otherwise) so does it need to be included in this credit, or anywhere in LEED, at all? Perhaps not? I saw below that color added at point-of-sale can be excluded. But, when considering the overall intent of this credit, the additive does contribute to odorous IAQ and could potentially be harmful/irritating to installers and occupants. What would you do in this situation? Thank you!