I am currently at the finishing stages of a project. While sanding the piece I noticed two boards starting to cup. I surfaced the lumber myself by removing a little material in three stages. Obviously the lumber was not properly dried. Is there anything I can do to get the lumber to cup the other way. Unfortunately there is snow on the ground so I can not do the grass/sun trick. Can I finish the concave side which will allow the convex side to dry and hopefully shrink? What about putting a fan or light on one side? Thanks for your help. You guys have bailed me out before.