Previous Paint Job:
You might not know exactly when your home was last painted. The type of paint used, the quality of paint, how many coats were applied, and even the color used can all affect longevity. Overall, high-quality paint in lighter shades tends to last longer, especially if it was applied in two to three coats instead of just one. As far as paint types go, 100% acrylic paint is the most durable and resistant to fading. Inexpensive paint breaks down quicker and become chalky, which can cause it to flake off easily. Depending on the severity of your chalking paint, you may need to repaint your home. Also, any existing damage that needs to be repaired will affect your project.
Paint quality plays a big factor in the cost of your project. Lower quality paints may save you on material cost, but often result in a lower quality finish as well as higher labor due to extra work to make the product cover. Premium quality paints are going to give you a better finished result. They are easier to keep clean, last longer, have better coverage, hides defects better, and give you a more durable/uniform finish. Overall premium paints provide you with the best protection and finish.
Painting over dark colors may take additional coats of primer and paint to achieve the best results. Picking dark colors to paint with can also take additional coats of primer and paint as well. Colors like red take a grey tinted primer and multiple coats to cover properly. Changing from a color to white can also take multiple coats due to the lack of pigment in the paint.