Also, when I went to the Palazzo Grassi here in Venice, my favourite works on display were hand painted negatives by Ukrainian artist Boris Mikhailov.
a view of the exhibition. image found here
Here's a few close ups of Mikhailov's images:
I'd like to make this a project of my own when I get home; tinting the photographs that I have found and inserting them into frames that I'll make.
Here's a website giving a bit of a tutorial on ways to do it : Vintage Image Craft