I recently had a handyman unclog a kitchen pipe, and he failed to use a any kind of bucket while doing so. He got both water and chemicals all over the particle board. He cleaned it up, but one particular spot got really damaged. It became discolored and swelled. I don't think mold is a problem, it smells acidic. But it won't dry. I found a nice article about repairing particle board, if you can dry it, but it won't dry. What can I do?