Our manhole door finished:
We used melamine sheet so it will just wipe clean of prints. Better than using gyprock with ceiling paint - will be terrible with prints. We also put Soundscreen insulation as it is the perfect thickness for the door (from what we have as left-over insulation)
We used form flex on the inside edge of the door and on the timber where the door will sit when it's open. So it's got a softer landing.