i think it is good if anything that the chip is on the spoiler rather than the boot itself. the spoiler can easily be taken off for repair without leaving your car behind but i guess they will keep your car there to colour match. my guess is if you do not accept touch up then they would blend the damage. mind you your spoiler may come back worse than before. or that there will be another problem because nothing ever comes back looking or feeling factory. but looking at your pics the damage looks bad and i think you should have it fixed.