I currently have these shelves for plants and nicknaks which are made from solid pine. The shelved are attached to the wall using 5 Hafale concealed shelf brackets per shelf. The wood is a bit twisted and shelves aren't quite wide enough so I'd like to rebuild the shelves using a 4x2 batten and ply. Will pine 4x2s (one long peice at the wall plus 5 perpendiculat short peices attached with pochetholes and screws) and 8 mm ply be strong enough/the recomended plan? I plan to paint it white.