I am by no means a pro so I will spout some cliches for you, I think it would be beneficial to step up to a more aggressive pad if you saw no result with the orange pad if it is
LC pads than use a yellow pad, if it is edge than step up to the green pad. Make sure you work the product in until it is translucent. It is harder to polish on angles so that also may be contributing to your problem. I assume you didn't try using a polishing pal or some other hand polishing aparatus but you might want to consider using a compound by hand in an inconspicuous spot displaying said defect. I am not a body shop guy either but if you can not clean it up with typical polish steps than you might have a paint problem in which case you'll have to bring it back to the shop. Have you considered finding a pro from here in your area to take a look or a stab at it?