The rolling bar cart (or BBQ cart) with removable tray is the latest addition to my suite of DIY patio furniture. This site has become a bit of a building obsession with me. Even with the detailed instructions, I still found ways to make this project my own: I added a 3/4" dowel and plastic wheels, instead of wood rounds. I painted all the pieces with primer and exterior paint before assembling it, because it's hard to get paint between the slats, unless you have a spray painter. The white slat design of the bar cart, park bench and matching side tables goes with the white siding of the house for my own patio picnic.