Louie
You can do the lettering with an ink roller (brayer). They are available in varying widths. I use them to restore vintage license plates. Even though the lettering you need to do is much smaller the principle would be the same. You don't want the paint too thin or too thick. Don't use too much pressure. I don't imagine it would be necessary to make more than one pass to do those letters but if it were let the first coat dry before doing the second.

You can do the lettering with an ink roller (brayer). They are available in varying widths. I use them to restore vintage license plates. Even though the lettering you need to do is much smaller the principle would be the same. You don't want the paint too thin or too thick. Don't use too much pressure. I don't imagine it would be necessary to make more than one pass to do those letters but if it were let the first coat dry before doing the second.
