In my experience, all vinyl except new has at least SOME crackle. But that could be b/c I don't use a vacuum LP cleaner.
As for the wood glue treatment, I've used it quite a bit, but even it does only a decent (not perfect) job and doesn't remove ALL crackle. And...be very careful using wood glue, as it's very difficult (edit: oops, I mean easy) to leave small traces of the glue on the LP. When that happens, it can be VERY difficult to remove it without damaging the vinyl. Water helps if it's standard wood glue and not waterproof glue. Be sure to apply a decently thick layer of glue, spread it as evenly as possible, let it dry long enough (virtually clear and no yellow areas) but not too long (to the point of getting brittle, could be 10 hours, could be 24 hours). And use tape tabs on both the lead-in groove and the runout groove to facilitate removal of the glue. These tabs can leave their own residue... Oh, and under no circumstances let the glue get on the label!