You might try oven cleaner. It's an old model paint stripping technique. I built models for like 20 years, and it's been a life saver a dozen times. It doesn't hurt plastic and will take off a lot of different paint if it isn't impregnated printing like on a key.
I like "Easy Off" odorless in the blue can.
I'd try just spraying some on a cloth wearing gloves and rubbing first a test spot somewhere on the board to make sure there's no reaction which there shouldn't be, then the text and see if you get any reaction with the printing, then the next step would be to mask the area, or remove the plastic top part, and spray it onto the printing and let it sit for 15-30 minutes. Then rinse it and rub it with a brush if you see any reaction, then wipe it down. Most enamel paint like testors, or even acrylic will just crumple up leaving clean plastic underneath.
My guess is that this is production lacquer however..which it may have a tougher time with...