The directive you have referenced was dated 6 October 1941. By the way Ms 1A became Ms 11. Two full months before the attack on Pearl Harbor and a lot of things happened in regards to camo painting the Pacific Fleet during those two months. The textual records show that as PacFlt command dragged their feet about adopting the new camo paints and schemes, by calling for evaluations on destroyers in DesDiv 9 prior to selecting a scheme to adopt. BuShips basically had cut-off the supply chain of 5-D paint in July 1941 and the supplies were running low at PHNY. Some ships, cruisers and destroyers, started to paint in 5-S prior to the attack and can be detected in photos, based on their relatively lighter appearance in the presence of 5-D painted ships. So some supplies of 5-S paint was available at Pearl Harbor. On 4 November 1941, a full month before the Pearl Harbor Attack, the Atlantic Fleet issued direction that 5-N would replace 5-S in the camo schemes. On 18 November 1941, Pacific Fleet destroyers were ordered to turn in all 5-D paint, except for 10-gals for touch-ups, and to be painted in Ms 11, which at the time was thought to use 5-S paint.

With the 27 November 1941 notification that war could happen anytime soon, the PacFlt was getting ready to "potentially" move the fleet to protect the US Forces in the Philippines. I can readily believe that the next week prior to the attack saw meetings and VERBAL approvals to do things like paint the battle fleet (a very LOW PRIORITY DECISION that could be made and directed in minutes). I'm not sure if those directions weren't to skip 5-S and go to 5-N.

In mid-November 1941, the destroyer USS FLUSSER from DesDiv 9, painted with 5-S in September-October 1941 during an overhaul on the West Coast, was directed (via speed-o-gram) on 21 November 1941 to be repainted with 5-N to allow for evaluation of the paint for scheme Ms 11 (rev with 5-N). She was on exercises until returning to PH on 26 November and departed on 5 December 1941 with the USS LEXINGTON Task Force. Is there textual proof that the battle fleet was directed to repaint with Ms 11 the week prior to the attack, none has surfaced. But, verbal orders when PacFlt and PHNY were located in the same place, is quite possible. There was time prior to the attack for USS FLUSSER painted in Ms 11 with 5-N to be observed and blessed as the scheme/paint to be used by the Fleet. Further, the fact that a directive for PacFlt ships to paint in Ms 11 (5-N) was IN coordination LIKELY at the time of the attack and issued on 16 December 1941, points to the decision had been made already. Which battleships, if any actually started the repainting process, I can't say. Some photos point to "lighter" paint used on parts of USS ARIZONA's wreck. But, proof that it is 5-D, 5-S, 5-N, or fire damage, as I say ISN'T possible from grayscale images.

My interest in camo paint during 1941, has been focused on the USN destroyers. Photography is rare during this period. But I have come across some photos of Pacific Destroyers painted in the summer and fall 1941 experimental schemes. Further, the specific memo DIRECTING USS FLUSSER to be repainted AT PHNY from 5-S to 5-N was very eyeopening to me about the direction of Pacific Fleet Camo was or had been decided to be.

As for painting your model of USS ARIZONA, do as you please.