Just like OVER restored major classic cars and I am not thinking of mid 1950's Chevrolets or Plymouths either.Frequently an unrestored English sporting rifles,even worn ones will sometimes exhibit more quality that a long rifle never had to begin with.The Brits made it a common thing to turn out high end guns as did some European makers.John Bivins and I discussed the English and German guns years ago and he said that no matter how fine the workmanship was,the "Cloven Hoof" was a;ways seen in the German guns and I agreed.
I claim NO ABILITY as a restorer and never really thought of it as an avocation because wood working and the endless variety of finishes
can be a challenge.I tell anyone that GUNS can be made by low skilled people but FINE FIREARMS are made by skilled craftsmen AND women as proven here by Maria Gray and Smart Dog.
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Getting back to restoration of guns and cars,simply sanding off old paint or varnish and replacing it with NEW paint and varnish won't work.
Glen Napier who was not well known built fine muzzle loaders in a little shack/shop in a small town 5 miles from me and also restored long riles for a local millionaire and some of them were little more than kindling wood and rust.He was a REstorer with very limited means.
To the opposite extreme was a friend in Florida who stripped his Duesenberg dual cowl phaeton to the last nut and bolt and rebuilt it from the ground up into a supercharged and trophy winning driver he used a lot.RIP Harry V.
Bob Roller