Oh man, is that a beautiful kit or what? It's my favorite 1/72nd scale armor kit, hands down.
The detailing you've done on it looks really nice. Mine were built for wargaming, so they are straight OOB.
I haven't done a review of the Tiger II's usage, but it seems that quite a lot of the ones that were built and saw service would be without zimmerit. Just consider how many of the older heavy panzer battalions would lose
all their tanks in some horrible battle and then need a resupply. I don't think the 509 sPzAbt, my own favorite unit, had any with zimmerit for the fighting in Hungary in 1945, frisntance. Same goes for 501 SSs.pzAbt, which left all their Tiger II's as nice presents for the Allies in the Bulge.
Anyways, if you pick a specific unit you want to paint, let me know and I will take a peek at
Tigers in Combat I for you.