spray painting
Refers to the act or technique of painting with a spray gun, often in automotive, industrial, or artistic contexts.
彼は車のガン吹きを趣味にしている。
He enjoys spray painting cars as a hobby.
ガン吹きの技術を磨くために練習している。
I'm practicing to improve my spray painting skills.
Compound of ガン (from English 'gun', referring to a spray gun) and 吹き (the noun form of 吹く 'to blow, spray').