Are you the imposter - Astronaut

I printed this with 3 filament changes (No MMU Required)

1. Starting colour you want the body 
2. Change filament at 2.1 (Visor colour)
3. Change to black outline at 2.6

It has a hole for an 8mm magnet in the back. I just extended it with another magnet to get it to stick out further as it prints flat - Circa 17 minutes

There is some small artifacts left but this cleans away giving you a finished look. I’ll investigate the model to see why this happens in the slicer.