I'm not exactly familiar with the part you're speaking of, but a great technique for doing anything "raised" is to shoot some lacquer paint on the part in the color you want the letters to be, & then spray the part in enamel with the "overall" color.
Once the part is dry, you can carefully remove the enamel from the letters with a little enamel thinner on a small swab or tooth pick.
The lacquer underneath will be unaffected by the enamel thinner & the raised areas will show through.
It's a great technique usually associated with chrome body scripts using foil under the paint.
Steve