That being the case, the only way to effectively preserve the markings is to carefully mask them with low-tack tape (3M painters or similar) and
very carefully polish around the writing and border. Problem is the small writing beneath the T2 as it is too hard to mask each letter. You would be better off applying a carefully measured block mask to the small lettering, but you will have dulled/spattered areas under the mask when done polishing around it. Same idea for the "ON/OFF". That might look worse than the actual combat paint spatter. I think leaving the plate alone is a good idea, just apply a low tack mask over the entire plate while polishing and remove when done or just be very careful not to get any cleaning solvent on the plate itself. You also run the risk of having even low-tack tape pulling up the lettering or getting polish remover under the masked areas which will also dissolve the paint.
Final option is to clean the entire plate off and paint your own custom logo or apply a custom logo decal, but that's your call. You have already "ruined" the collector value by stripping the black paint off, so why not personalize it, right?
Mike