Filling chrome emblems

I am getting ready to have my car repainted and I asked the guy to give me the chrome fender emblems for my 65 cuda as hes prepping the car so that I can give them a polish and refill the black paint that runs along the center of the text. Does anybody have any tips about doing this? type of paint to use? I was thinking about maybe using hobby paint with a little thinner in it with a syringe?