They sell this stuff called "Rub 'n Buff" at MJ Designs .
All you do is dab it over the engravings and rub it in with your finger and wipe off the excess (I used Outers Gun Oil).
Here are a few pictures of it, Now sorry for the quality of the pictures, they were taken with my cell phone.


Now the pictures do not do any justice to the looks of it at all.
Anyhow, Just thought I would share that with y'all