Ask the Experts?

This is my canvas that I would like to put the Rust-Oleum matte finish on. I don’t know much about what you can do to finish acrylic canvases.I did this picture of my granddaughters having a backyard picnic in September and I joined the Creator’s Studio in October.

This was a 24 by 24 picture I took. I copied it to a 24 by 24 canvas using graphic paper.Then I painted it with some acrylic art paint that I mixed and blended along the way. It took a little over a week to do. I’m happy it turned out. I learned this method from a flower painting class I took online.So do I ask the experts or does someone know, can I put the Rust-Oleum matte finish on this?