What a finish is
A finish is what is on the face of the metal: a factory paint system, an anodic layer on aluminum, or nothing at all (mill finish).
At AFS, painted steel always takes a color from a chart; aluminum asks for a finish choice first, Anodized or Painted.
Sources
- AFS quote and FlashDraft finish rules (which chart each material and finish uses) - Architectural Flashing Supply