New headliner done!

derpomz, if you have a look earlier in the thread I have put up a photo of the spray adhesive supplied by the headliner supplier. It sprays on with a fine string texture, I was able to do the job with one can...just!
The material is a special foam backed headliner, comes in different colours.
When removing the original headliner, the top material just pulls straight off, leaving the residue of the old foam behind. I used a bristle scrubbing brush to go over the shell to remove the residue, then I used lacquer thinners and a brush to help dissolve what was left.
With a bit of effort it will clean up well enough to enable the adhesive to stick properly.
It's a bit of a messy job, have a dust pan and brush handy, along with a plastic bag to dump all the mess in.
Here's some photos for you, hope that helps.
Cheers, Pete.