First time working with wood - i CNC'd a landscape into a piece of London Plane timber but since first purchasing the wood, the left hand side of it has slowly curled upwards. Most of the curling happened over the weekend when it was left sitting on a table - oops. I assume the thinner part has dried out faster than elsewhere, causing it to shrink on the side that was exposed over the weekend.
I've been spraying the surface lightly with water every day, and now leaving the underside exposed. Since doing that, it appears to have unwarped by around 30%.