I’ve had some pretty bad experience about cleaning older Machines such as my NES, where I’ve accidentally rubbed a lot of the letters and number off and noticed too late. Thats something im particularly worried about when it comes to the keycaps. Is there a reason to worry or tactics I should try to avoid rubbing the letters off?

Another thing im wondering is since its a bit yellow, what kind of Retrobrighting will work on both keycaps as well at the body of the machine itself? Since it seems to be Metal. Issue here also being that I wanna keep the original labels and stickers on the machine intact, so throwing the body into retrobrighting liquids seems like a bad idea… even disregarding the potential of rust afterwards…

Talking of body rust, I also guess that for general cleaning of the body and the keycap metal springs, something like using a wadpad and Ethernol 99 would work the best right?

I really don’t wanna screw it up like the NES, so all advice is highly appreciated!