(Thanks for the english, its much easier for me. Altough I was in Austria and Germany in holiday for a week, it was way too few time to practice German
The tank was shortened a little bit. The real tank car is available in 17m and 15m length. The photo is a 17m car, my modell is a 15m car - shortened. The bogies will be the standard PIKO Y25 bogies, the buffers and the couplings also.
Printer: Craftbot. Material: PLA. I use PLA for outdoor, without any problem. When you paint it it will not bend in the sunshine. My german-type signals made from PLA are outdoor on my layout since three years, no problems (only the dog!
After printing first I sand down the raw prints. 180-150 paper. Then I primer spay it ("MOTIP spray putty"). Two layers.
Then I sand it back with paper 180 - 200 with water. Then finishing with paper 1000 wasserfest, polishing it. Then comes assembly.
I took the modell apart for printing. So the tank is:
2 end caps
I make "stifts" for assembly and positioning the parts. Also I made a small metal weigth in the tank, glue it in the barrels then glue the end caps on.
The main frame will be 8 parts and then glued together (Henkel glue). Different printing methods needed to be able to print all parts! If you print them in more parts it will be more accurate - but more work needed to assembly. Another thing is to look: strength of the main frame. When I cut the main frame in 8 parts
I cut the modell in different places. It will be harder when the edges where you glue together are not in one place!
The main frame can be assembled to the tank, and painted together to the same colour. The steps and rails are different color (I use "white aluminimum" color spray for metal look). Those are painted separately. And then glued to the other parts.
I made the holes for the PIKO parts: Y25 bogie was measured and holes for the PIKO screws added to the modell. The buffers is the same way.
I use shiny spray, then apply the water transfer texts, then spray the modell with matt lacque and this is the finishing step.
A lot of work for a few tank cars!
I will make 8 of them....