So this has been frustrating me for over a year now. It's about the conservation of paintings, in particular acrylic paintings on canvas. I also draw and I have taken care of that issue with fixative and framing behind glass. Now onto the acrylics.. I do not use fixative nor varnish on them because a. I don't want to compromise their appearance and B. It could harm the paint and other stuff. Anyways I frame them behind glass but can this substitute the varnishing or not? Can glass substitute varnish. Please find me the answer and rid of my misery. It literally seems like I have had the shittiest luck finding an answer to this. Also do paintings need to breath or should the backs be sealed as well? I hope someone thinks of this things besides me