Unsolicited opinion - I apologize.
I would avoid Ross Cutlery for sharpening. They use a power grinder and stone oil. I’ve made the mistake twice ( step up from “keys made here a lock smith” sharpening ). If you happen to get one of the owners it’s probably decent.
I’m basing this off of two experiences, no expert by any means. One old Cold steel SRK and a Benchmade - damn near ruined.
You might be able to post a thread - services wanted , sharpening in Los Angeles.
Knife makers section?