hand car wash; foam car wash
Refers to a car wash service, especially one done by hand using foam or soap. Often used in the context of detailing or thorough cleaning.
I had a hand car wash done on the weekend.
This gas station started offering a foam car wash service.
Formed from 泡 “foam” and 洗車 “car washing.” The reading simply joins あわ and せんしゃ.