[Marshall V. Daut]

It'll take all of five to ten minutes to remove the dash rail from a Coupe. A couple screws across its face and one each at the bottom where the flanges bolt to the "A" door pillars. By the time you masked everything off you listed, you could have the dash rail removed and sanded, maybe even primered.
The Deluxe Coupe dash rail should have a wood-grained finish, not body color because your Coupe is a DeLuxe. Standard Coupes received body paint or upper body color.
Marshall