If it has been cut in recent times....less than a few years.....and it has no 'visible' damage, I do not recut it. Mind you, a long time ago, in the early days, I was obsessive about cutting the first mitre again, but I matured....or something....saw the error of my obsessive ways and stopped being so bloody absurd!
If you can't see a chip, crack, wham, bam, boom in it when you pick it up and inspect it with your beady little eyes, it's very unlikely that you will see any evidence of any damage after it's joined!
However there is one thing that we should check with mouldings that have 'compo' on them. Sometimes the wood 'swells' a little and can protrude further than the 'compo'. In this case, obsessiveness is permitted and even encouraged!
If a member of the public can't see a chip the size of a golf ball or a gap so wide in a joint that a bus could pass through without touching, on other framers frames, I'm damn sure they won't see a chip the size of the pointy end of a sharp needle, in mine, after I have touched it up with a single haired brush!
Greg,
I doubt very much whether wood heals up and I know that there are no mouldings in this country made from flower stems so, please give the non-obsessive method a try. You might find you like it! LOL.