So I was all excited that DeSerres sold these Poster Paint Markers by Sharpie because they were recommended by Julie Pritchard in a post about markers and pens I read of hers a while back and since Curry’s didn’t sell them, I didn’t think they were available in Canada. When I saw them on DeSerres’ website, I squealed with glee and proceeded to order black ones in every size, plus white, silver and gold.
When they came, I tested them out in my sketchbook and was happy with the results. I mean, it’s PAINT that comes out of a Sharpie, they’re totally cool and I figured they’d work for what I needed them for. (I think I’ve said this before, but finding pens and markers that are archival and lightfast that write over acrylic paint are hard to come by.)
Yesterday I was bored and decided to paint the cover of my current journal since it was just plain black and boring. So I painted it and it looked pretty and I decided to find a good word to write on the cover with my new Sharpie Poster Paint Markers and I chose “transcend” because that’s something I think I need to learn how to do.
I let the Poster Paint dry for a good hour and then it was time to varnish. At first I was just going to do a light coat of varnish, so I used Delta’s interior gloss varnish with the intent of doing 2 or 3 coats and when I went to brush the varnish on over the word, the Poster Paint totally streaked:

Dismayed and thinking it was maybe just THAT kind of varnish, I wrote on the cover of a notebook, let the Poster Paint dry for another hour and then I tried a different varnish on it (Triple Thick Gloss Glaze by DecoArt, which is the varnish I mostly use) and the Poster Paint actually streaked WORSE:

Soooooooooo Sharpie Poster Paint Markers, while fine to use in an art journal or something like that, are not gonna work for me as far as my paintings or pretty much anything else I do because I varnish just about everything I do. This bums me out greatly because I really thought they’d be the answer to my problems. At least I tested them, by fluke, on things that don’t really matter before trying them on a finished painting though!
Anyway, I thought I’d write this post and show the examples to save everyone else the headache of finding out the hard way if you’re like me and use varnish a lot.
As I said though, they’d be fantastic for art journaling or use on paper, just don’t use them on anything you plan on varnishing.