Repeatable coating on a real surface instead of a perfect lab plate
Leather and leather-like materials make the process more realistic than a clean test sheet. The surface absorbs liquid, changes the visible edge, and makes repeatable motion more useful than manual airbrush skill.
The challenge
The process needs a repeatable coating on a material surface that is not just a flat inert plate. Manual spraying can vary with hand speed, distance, overlap, and operator fatigue.
The setup
A CNC airbrush path controls motion over the sample while the head applies the coating at a defined distance and trajectory. The substrate behavior still matters, but the motion part is no longer improvised.
The result
The video demonstrates controlled coating over a leather-like sample. It is useful as a proof point for porous materials where repeatability and documented process settings matter.
Why this matters
Porous materials can reduce visible overspray compared with smooth non-absorbing surfaces, but the result still depends on liquid, pressure, nozzle, speed, distance, and absorption.