It goes on fairly easy. Mask everything well. I would avoid spraying any tabs, mounting brackets etc. This stuff goes on thick and could affect tolerances for clips and other items mounted to the car (eg, where the glove box hinge mounts to the footwell or where the seat brackets attach, etc). It will cover any screw holes - so if you want to be able to find them, then tape those off as well. Plug the seat belt harness bolt holes in the floor and the holes for the plastic plugs in the side of the inner rocker. The high bosses on the parcel shelf should not be sprayed as the plastic clips will not work through the extra thickness.
happy spraying...