Na Nond used Tamiya's kit and applied various aftermarket Photoetch parts ranging from Lionroar, Gold Medal Models, White and Ensign and a few others while the rest are scratchbuild from sheet styrene in various sizes. It took him 40 hours to complete the intricate details and more than half that time went into masking, deck planking and painting the camouflage.
Applying masking, scratch build and PE parts
End Result is the Scharnhorst berthing on a calm sea
The ocean's effect was accomplished using a clear architectural screen, painted over to look like calm seas. The effect is rather impressive as seen above. The link is in Thai so you'll need to do a little scouting to find a similiar material in English.