I will be adding a rain barrel to our back yard but I want to have something nice to look at rather than a plain blue barrel. I would like to use some of our favorite photos of flowers we have seen in our travels, print them out, paint the barrel a solid color, and adhere the photos to the rain barrel. I am not sure what steps to do and what adhesive and protective covering to use to make it waterproof. Can anyone help? Many thanks.