Under acidic conditions CBD cyclizes to THC (per wikipedia, anyway). I've often played around trying to improve the high from crappy weed. I assume that this is the result of higher levels of less desirable cannabinoids. As I recall, CBD can be up to 35% of the cannabinoids present, so getting cannabidiol to convert to THC could result in a substantially altered high. I'm not gonna bother with the math, but 5 to 10% THC by weight is fairly common, so that would mean that maybe another 5 to 15% of the weight would be CBD. You could double the potency of your weed, or better.
I don't think this crosses into synthesis, and I don't think it's really a BDD or cannabis FF question.
What would be a smart route to go about this? Since THC isn't water soluble, would simply soaking it in vineager for a few days, removing, drying and then (I assume) rinsing work?
It seems like a lot of work, but for an experiment with cheap weed, it might yield interesting results.
Or it might do nothing. Would acetic acid be acidic enough?