So far, it's been no problem for me to spot the "relic-ed" from the relics, and it's funny that you bring in the boob job comparison: they just don't look natural.
This fad of relic-ing an instrument really confused me when I first encountered it, as I didn't understand why you would take a new instrument and purposefully age it. But in the end it is just another shallow attempt to use money to acquire something that isn't real.
No, the instrument is not a few decades old, and is not "aged" or "improved".
No, the owner has not owned and played that instrument to this point of wear.
But, with money and self-important malice, I could F**K up an instrument just enough to make a bunch of easily impressed nobody's believe that it's something else. It's sad shallowness: you can't buy real mojo.