Don't believe you will find someone in San Diego with all the knowledge you will need but that is ok (Exposure to many original untouched Dearborn cars) . Just look for someone that will take direction and input while doing your project. There are allot of body shops out there but not allot or shops that want to get dirt cleaning your undercarriage, disassembling and doing all the steps required. So don't take their word for it, ask for references from other owners that have had the SAME jobs preformed at that shop recently and talk to them.
On top of that is the area a water based or base coat/clear coat region? Since its near impossible to get the right amount of overspray with the LPHV guns or real looking overspray at all with the water based junk.
Then for a concours level job most shops have gotten lazy IMHO or focused on the glossy prefect paint jobs where they skim coat the whole body, cut all the openings and then just build on the clears. This whole process produces perfectly smooth and flat bodies, all color sanded and buffed out as well as edges that look twice as thick as original. All producing a dipped in plastic look. Fine for the Autorama or World of Wheels shows but not IMHO for concours
BTW its sound deadener not undercoating
Under coating is what the dealer did - sound deadener is what the assembly plant did.