[Milsurplus] White filling material for lettering

[John Watkins]

Hi All,

Know this has been covered a million times, but what is the best way to fill in engraved lettering?  I have to refinish the front panel of my YC-9 (US-9 Russian BC-348.  I remember that there was something that could be rubbed in after painting that could then be whiped off before it dried.  Can't remeber what it was or if it was all that great.

Thanks,

John  WD5ENU/A45XV