Check to see if you can remove the oven door and do all this painting outside. It should lift right off if you fiddle with it. Otherwise you need painter's tape and a mountain of newspapers to cover every square inch in the motorhome that you don't want overspray to hit. Besides, painting an oven door laying flat will be 10 times easier than painting it vertically.
Practice on something else doing nice light even coats, nothing heavy. Let it dry some before spraying the next light coat and so on. Once you get the hang of it, prep and paint the stove.
I once lived in a vintage mobile home. It came with PINK stove, pink fridge, and pink double sink. I decorated around it and became quite fond of the funky color.