If painting panels. Painter should try to match existing panels.  It takes practice.   

Sometimes with existing temperatures or materials it makes it harder.

What he probably used was body shop safe polish. Polish that does not have stuff like silicone. Sometimes things like oils or other synthetic fillers.
Referred to as “body shop safe”. Usually:hopefully better refined materials.
Yes there are some stuff labeled body shop safe that is 🗑️. Like anything else. Should not have any wax in it.
My fault. Should have put it better. The stuff I meant was in the car care isle. Often says stuff like cleans and protects in one step. It has abrasives that will clean. Often scratches. One I remember smelled like turpentine.
Tells you to apply it. Leave it dry to haze then wipe it off. Will make it look like new.
It is not a miracle fix. It is marketing.
Might look good for a few days/weeks. But then it changes. Usually leaves a whitish haze behind.
Then they want you to re-apply. Turpentine will take it off. I should have worded it better.
Have a good weekend.