The old barn door - reworked

I showed you this print of the old barn door in my last post.

I had a total of 3 prints, the above one being the best of the 3. I took one of the 'lesser' prints and worked on it with pen (black and brown ink) and soft pastels. And I love how it turned out!!

I am wondering if I could use some watercolors on the other print. The print is printed on Mulberry paper, not sure if it will handle washes... And I am even not sure the printing ink is waterproof. Maybe I need to check that first!