I do not have 3d printer yet- I use my friend's 3d printer. He has 3 printers and I think He used Prusa with ABS+ material. I did not use bondo to fill print lines- only for gaps.
I just used sandpaper from 80 to 400grid. Only wet sanding but this is first 3d print for me so I am making mistakes etc . I know that I can do it better but after 3 day of sanding by hand I just want to move next step.
small update
It is also first time for me to use airbrush and vallejo air paints not like before paint in cans(automotive)
After few days I can tell this is very nice and funny work but also a lot of stress . The biggest problem is with airbrush and proportions of paint and flow improver /thinner.
Paint should be like milk but with gold and silver paint is not working like this. Every time when you will block airbrush- cleaning all parts- around 10 minutes .
Also price of paint is MEGA EXTRA BIG for 18ml is around 2,5£ when for this price I can of automotive paint.
But the color is better from Vallejo air and also no bad smell and toxic fumes.