My husband and I are planning to put up beaded board on the walls of our new mudroom. We purchased 3/8" sheets from our local lumber store, when we painted the first sheet the grain raised up so much that it looks like exterior grade pine. Looked for MDF sheets of beaded board but can't find it anywhere, thought that might help with the quality after paint. Any suggestions for a resolution or a place to find nice material that still looks good after paint? Thanks.