Going off of memory here so I will definitely yield to the experts on this one, but as I recall the SBD-1 wasn’t in service with the USN very long. The navy didn’t like the lack of armor and self-sealing fuel tanks so most of the SBD-1s were relegated to Marine service. I think they may have been moved from their pre-war yellow wings to the Gray on gray scheme used at the time Pearl Harbor was attacked. Now I may be confusing the TBD with the SBD, but I want to say that most of the available SBD-1s were destroyed on the ground at Pearl. Everything after Pearl was SBD-2 and on and what SBD-1s were remaining were used as trainers. Again, could be wrong…probably am.
With regards to your question on the Aluminum finish, all the Navy pre-war aircraft were not left bare metal. They were sprayed with silver-colored aluminum-based paint meant to prevent corosion. Pre war they were in fact yellow-wings on aluminum fuselages, but at the outset of the war they had been painted blue or gray.