We don’t often talk about Renaissance high art and ’50s rock ’n’ roll guitars in the same breath, unless we’re forming a new rockabilly-prog band called Hot-Rod Maximus. (You’re welcome.) But in the modern world of art and guitar collecting, items reputed to be the work of either Leonardo Da Vinci or Leo Fender are subject to much the same scrutiny from experts in the field, are known for fetching vast prices from discriminating buyers, and, given the millions of dollars potentially involved in even a single sale, are likewise expected to stand up to the most rigorous high-tech scientific analysis, as well. Right?