The video below shows me quality checking the finished starlight headliner before it gets installed back into the vehicle.
Ive seen other inexperienced installers clipping the fibres back once the headliner is installed into the vehicle. This is probably because they arent securing each fibre in place and risk them coming out during installation, to save time or both.
I prefer to finish and inspect the headliner before it is installed back into the vehicle. This way I can look closely at my work and ensure the perfect finish. I usually sped hours on this and finish with pressision tools such as tweezers, side cutters and a big magnifying glass! Its important to me that when the stars arent lit, that the liner looks as OEM as possible.
When the fibres are cut roughly and left poking out more than necessary, the light produces a halo effect around each star making it appear a little blurred and much larger than it should be.
When finished professionaly the stars should look like tiny pin points of light with various diameters, scattered around at random with clusters and empty spaces, just like a real night sky.