Paint Coverage Calculator — Primer & Paint Quantity

Typically 2-3 coats of filler primer. The first coat fills the deepest layer lines, the second provides a smooth base. Sand lightly with 400 grit between coats. Some prints may need a third coat for a perfectly smooth finish.

Spray paint gives the most even finish and is fastest for medium/large parts. Airbrush gives the finest control and thinnest coats (ideal for miniatures). Brush painting works for small areas but can leave brush marks on large surfaces.

Layer lines create micro-ridges that increase effective surface area by 15-25%. The rough texture also absorbs paint faster, reducing coverage per coat. Filler primer helps by creating a smoother base surface before painting.

Automotive filler primer (like Halfords or Rust-Oleum filler primer) works excellently as it fills layer lines. For miniatures, hobby primers (Citadel, Vallejo Surface Primer) are thinner and preserve detail better.