I noticed when sorting the foam for the headliner that there were a few blobs of rubbery adhesive that stuck out and meant the foam didn't fit flush. I decided to grind them off a bit to get a better fit.
As I'd already shaped and cut out the foam it was time to add the alcantara to match the roof clamp.
This was done in much the same way as the clamp, where the foam was laid down and coated in a few fine layers of the 3M adhesive. I tested the tackiness as I went and found that because the foam is quite porous, a lot of the glue was going into the holes and not laying on the surface.
To counter the porous nature of the foam I decided to spray directly onto the alcantara to add that extra layer of adhesion. I was apprehensive about doing this as it would increase the chance of wet patches on the fabric, but it spread well and didn't show through the other side which was good.
I then gentle laid the fabric onto the foam the same way I did with the clamp, letting it droop in the middle and then spread the fabric outwards to avoid air bubbles and folds.
I then took some scissors to cut out away the excess material, leaving enough to fold and wrap over the edge.
Like the clamp I cut little triangles out the fabric at the corners so it would wouldn't overlap. This was the first corner I did and others were neater, but as the headliner kind of sits under the lip on the roof recess the edges would be mostly covered anyway.
I didn't use any spray glue on the underside of the foam as I bought some with a sticky backing, so just rolled and pressed the alcantara onto this. I left the majority of the backing on as I'll use this sticky backing to help fix it to the roof along with another strong adhesive on final assembly.
Overall happy again and ready to go onto the roof.
