A teenage son stands next to the family car in the driveway, clearly finished with his washing and waxing duties. His father surveys the results with a less than impressed expression. The car's finish looks patchy and dull, with obvious streaks and missed spots that scream rushed job rather than careful attention to detail.

The setup 'His son washed and waxed the car but did a , ' leads to LACKLUSTER JOB, which works on two levels. Lackluster literally means lacking luster or shine, which perfectly describes the car's poor finish after bad waxing. But lackluster also means low quality or half-hearted, describing the son's work ethic throughout the whole task.

I give this a solid 7/10 for clean wordplay that doesn't feel forced. The visual joke matches the verbal pun perfectly, and any parent who's watched their kid rush through chores will appreciate the realistic scenario.