Have some scratches on MS3 Sunlight Silver on left front bumper from a small H&R, 2 shops said they would prime / paint / clearcoat/ no swirl buff! for $150 if I fixed scratches and brought them a completely stripped bumper. $449 if they did the R&R to, said they wouldn’t even want to touch up and blend, couldn't guarantee results, so I speck they would do complete panel from beginning to end $300 sounds pretty much correct. If you bought the paint , clear coat , primer and 2 activators it would cost you $170 for materials alone, not to mention your time to accomplish the job.