Is there a way to replace S9 housing, can it be done in repair stores

After 2 months with my S9, I’m just not getting along well with androids, and so I’ve decided to swap and I’m looking at selling my S9. It’s in perfect condition apart from a scuff on the metal housing. I’ve been told it can massively effect the value and so I’m wondering if this can be replaced easily and if so, is it a common service I could receive in a repair shop. I’ve attempted such a repair before on an S3 many moons ago with less than successful results, so I can’t see myself carrying out the repair.