The most authentic P-47 restoration to-date, the P-47D-28 "Dottie Mae", detailed photos galore here (both prior-to and after restoration):
https://www.facebook.com/pg/Allied-Fighters-254129241462297/photos/?ref=page_internal
The metal on "Dottie Mae" is not polished, but is fresh Alclad, just as it would have appeared when new from the factory. The darker, less shiny sections of metal are of course stainless steal - stainless steal makes up most of the belly of the aircraft, due to the high temperature of the intercooler/turbo, ducting, and exhaust. Other details that can be spotted on the "Dottie Mae" restoration is the authentic use of various colored rivets - silver, yellow, blue and red - mostly used in a unorganized manner, as per original, as the various rivets, namely the silver/yellow/blue rivets, were mixed together in trays on the factory floors, and whatever color rivet was used was whatever rivet the riveter pulled out of his pocket at that particular moment. Areas where panels have been spot-welded you can see bright lines, a result of acid being brushed onto the aluminum to purify the surface of the metal prior to spot-welding - as per original. All of the stencils and numerous other details are not only accurate to the Republic drawings, but are as they were found prior to restoration.
In the same league as "Dottie Mae", is the P-47D-30 "Tallahassee Lassie". While "Dottie Mae" has been restored precisely accurate to the D-28 it is, "Tallahassee Lassie" was restored precisely accurate to the D-30 it is. Most notably is how different the cockpit is between the two. Being the later variant, "Tallahassee Lassie" has the rocket stubs and rocket-firing panel in the cockpit, where as the earlier variant, "Dottie Mae", does not (not to mention the difference in gunsights, instrument arrangements, switch panels, etc.). Here is a large collection of detailed photos of the incredibly authentic/accurate P-47D-30 "Tallahassee Lassie":
https://www.facebook.com/Randy.Malmstrom/media_set?set=a.1248468561847465.1073742547.100000529987087&type=3
http://westpacrestorations.com/index.php?page=p-47-thunderbolt