I took it home and washed it quite a bit (not the painting, that one stayed against my best efforts! - how did they do that??!)).
I gessoed it and.. ta-daaa! A new wonderful immaculate! life for this huge canvas (thanks, Universe, for the present!) :-)
And I made the collage above where I used photo transfer for the first time and LOOOOVED it! YAY!
I was thinking to bring it for my father to Romania as a father's day present, as I go there soon..
But.. It is too big to take it with me on the plane (+kid+luggage and such), I will have to find another way to give him this present.. At the moment I plan to make small pictures of it, print them on photo paper on A4, take the staple with me and collage it there again :-) An artist's life :-) making collage from collage from collage :-)