Finally we sanded the keel of the steps and imperfections, it will be painted on Sunday morning with acrylic paint, which should also fix a texture problem that was original of the FS 98 model and that unfortunately when I vectorized the textures I ended up reproducing.
The sanding was done with sandpaper 180 initially to later go to a 120 and later to 100, as in my plastic model time.
More updates soon.