I am not sure if it applies to your model but RT once put a coating on their stainless steel to mitigate the risks of corrosion. I don’t know if that is what we are seeing in your pictures, but for my generation of the Bull, be very careful. f it were me, I would ask RT before I would put any harsh chemicals or abrasive sponges on it (think 3M green and blue) for polishing. As you mentioned the imperfections have a depth element to them, it definitely requires their disposition as the manufacturing process may not have ensured proper cleaning before the plating process was performed which means it could propagate in another area which would be upsetting. Also, if you decide to attempt a fix, look at the grain pattern for the metal and clean by wiping in the same direction of the grain. Try a small piece to check for any reaction or problems, then expand to the other areas. Just a few thoughts, let us know how you resolve the issue.
Edit: I have seen that pattern on other cookers when BBQ sauce or similar acidic compounds were introduced to the surface and heated. Hopefully that is not the case for you but for others, never let a sauce sit on metal or you may have a compromise to the surface finish.