Inexpensive plastic Adirondack chair found in the shed needed a face lift. Years of grime had built up on it, so I washed it down with one of those cleaners with bleach and let it dry over night. Using a fine sanding block I lightly sanded the area I wanted to paint to rough it up and bit. Since I never painted anything like this before, I hoped the light sanding would help the paint stick. I painted the picture with regular acrylic craft paint and let that dry for two days.
Then sprayed it with an acrylic sealer. I put five coats of the sealer on because this would be left outside all summer. I'd recommend this be stored in a shed or garage during the winter months.