To paint over ANY surface, without sanding, use a product called ESP Easy Surface Prep, available at hardware and paint shops. Wipe on, wipe off and paint in 90 minutes. Works well over enamel paint , without having to sand. SAVES HOURS of work. It was recommended to me by a professional painter (from website).
nice I might need to swipe my sons book crates for this easy diy rustic decor.... by http://www.top21-home-decorationsideas.xyz/bedroom-designs/i-might-need-to-swipe-my-sons-book-crates-for-this-easy-diy-rustic-decor/