When my headliner dropped, I took it out of the car and then took it to a local shop here that does auto interior restoration and custom interiors.
I knew that I was not up to doing the headliner fabric myself. Leave it to people that have done it numerous times and have gotten good at it.
I had seen some of their work on some local hot rods and was impressed. Ask around at your local car shows.
Having said that, there are people on the forum that are capable, but not me.
Material and labour was $100 Canadian 4 years ago. They used a heavier velour type material.
I would check this option out before putting some heavy paint up there. Not sure what that would look like. I would have to see one done like that with paint before committing to it.
Jim
Ontario Canada