I didn't get the original radiator with my car, but these were built by the same company that built radiators for Fiats, or so I was told, and our old Fiat had a brass radiator.
Most that still have them, are happy with them as far as cooling goes! Providing you get cool air into the motor to begin with...!
I would drain it, rinse it out, and just let it air dry. In TX that shouldn't be much of an issue.
If you are going to have it serviced, ie professionally cleaned, a shop will server you best here as they'll have a large tank to dunk it in...save you a lot of PITA work! Have them flow test it first. If it flows fine...it doesn't need much cleaning!
Cheers! That gold is going to look nice! Can't wait to see more pic's!