Airbrushing is a painting technique which uses an airbrush to give an
even and consistent surface, often used to create a high level of
realism.
An airbrush is a small, hand-held instrument connected to a canister of
compressed air that sprays paint in a controlled way giving an even and
consistent surface. Artists and illustrators often use airbrushing to
create a high level of realism. The airbrush was invented in the late
nineteenth century, but it was not until the mid twentieth century that
it became a popular tool in painting.