id also be using a spray glue.
we used to use stuff that came in a 20L drum and it was nice and thick. mix it with some thinners and use the spray gun.
you can get it in an aerosol but i dunno how well it works.
its important to spray the dash and the back of the fabric before you stick em together.
to fill cracks use body filler or that no.more.gaps expander foam and sand it back smooth.
personally id be using something more pliable than that fabric. not saying it cant be used but you may find it will come away from concave bends. the glue you use will make all the difference.