miniatureevolution
Hi b3aud,
can you maybe provide screenshots of the issues you have found? Either via E-Mail to contact@tetrahedron-games.com or provided as a download link.
We have printed every model several times ourselves and never had any issues. Due to the rough surface of the asteroids it is possible that there are microscopical artifacts somewhere, but those usually don't cause any issue when printing.
Is the issue something you just noticed or does it cause problems with your slicing software?