Hi All, I am hoping to hear thoughts on this. A friend of mine recently got married and I plan to do a beach sunset painting for them as a gift, with a couple (in silhouette, because I will totally ruin it otherwise) on the beach. I then wanted to write their names and the date of their marriage on there somewhere. I don't trust my hand at painting their names, so I was looking for options of other ways to get the writing on there. I found a YouTube video of a girl who does calligraphy over paintings and someone asked her in the comments section what she should use over her oil painting. The girl responded with, "Sharpies work!" The thought of this kind of terrifies me. I know acrylic won't work, so I was assuming Sharpie would be off the table too? Any thoughts or advice would be greatly appreciated, I've gotten many conflicting opinions on the internet. So I figured I should turn to the community I trust. 
Sharpie over oils?
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Are Sharpies real paint markers? I work with paint markers often and they're really suitable. One condition though is that you can't (or very difficult) draw over wet oils. An option would be that you create, in acryl or gesso, some sort of rock at the side where you can write their names on after you finished the painting.
Or even better, write it in the sand!!
A possible example would be 'Island paradies' S27E9 where you have quite some rock. Another would be 'Ocean sunset' S10E10 where you have quite some sand.
If you are brave enough Heather .... you still might try thinning your paint enough for the scriptliner and go over the oils, like you would sign it.
Other options ..... go Pop-art where you write/print the name on a small card and stick it over the fresh oil in the desired spot.
Or you could paint a hot air balloon in the sky (cover the surface with contact paper before you oil paint everything!)
Just some ideas ..... in fact, I really got interested now trying all this myself!! 
Thanks Voy! Lots of lovely ideas. I was going to allow the painting to dry before I did the writing on it. So I guess I can always try being brave like you suggested and painting it because if I mess it up, I can always wipe it off since the rest of the painting will be dry!
I bought a couple oil paintings circa 2003, which the artist had curiously signed in Sharpie. Seventeen years and it seems stable.
Ian_Adkins Thanks! Good to know. I bought some oil based Sharpies off of Amazon that some users said they had used to sign their paintings, so I think I will give those a go. Will probably practice on one of my used canvases I need to paint over to get a feel for how it will work.
@Voy Kay#525 oh I like the idea of the sand! If you don’t feel comfortable writing out their full names you could do their initials. I put my initials with a heart through it and made it look like it was carved into the wooden pole to hide my sig in the painting.
I'd be very, very cautious with sharpies. True, sharpies from years ago will still be there.. but, I have written in current sharpies on my fuse box which is dark/covered and the ink has faded. Both the red and the back to virtually nothing. I read a while back they changed the ink.