Flat panel doors 1) 2-3 undercoats and 1-2 topcoats ... booth to harden the paint 3) Top quality best price. Flat panel doors 1) Species:Chinese Fir, Pine, Radiata Pine, Paulownia, ... Specification:a) Size:160*160mm-2000*800mm, or customizedb) Door frame:Log,straight board,finger jointed board, Thickness:18-30mm ... marks, color difference, knots oiling etc.. f) Finishing: flat, smooth and clean surface