About this detail of the Tiger
This is the MG armoured cover on the Trumpeter Tiger kit. Trumpeter have made it smooth on the front portion, and they have given it a rough cast texture on the rear part, as though they were two separate things.
But the real cover was a single piece of metal with a groove in it. It was made by machining, not casting, so it was very smooth. It could be removed from the tank, therefore it was not welded and Zimmerit was not applied to it. These photographs show the MG cover on some Tigers of the period.