Just completed this 1/35 old Dragon Jagdtiger built OOB. I modeled it after 305009 which was the 9th Porsche Jagdtiger built and used as a training vehicle. The first 50 Porsche Jagdtigers received the zimmerit coating and none of the Henschel built ones had any.
The only extra things I did to it was to use a 30w soldering iron to make the zimm and the battle tracks were modified into transport tracks since this particular Jagdtiger was believed to have this track only.
Paints used were MM enamels, and Alclad lacquers. Weathering was kept light with some washes and weathering powders.
GS make sure you use a 30w or lower iron. I took a small thin old screw driver that was the perfect size and modified it to fit the iron. Go nice and light and you will be amazed how fast you can do the entire tank.