The was not so much progress with the model as I was on vaccation for some days. The hull was sanded and rewqorked with putty again, the red color was used to control if the surface is getting smooth now.
The little deckhouse is completed now and the two hatches are sanded and cut in the right shape.
I started to build the base structure for the engine room, but it seems that it does not fit into the gap in the deck where it should be located. So I will stop to work on it until the deck is completly prepared. The little black spots on the hull are the only parts that need some more putty and sanding, so I can add the deck to the hull soon.