In summary, painting a pickleball court can be performed with a roller, but best when applied with a sport squeegee. For best results, we also recommend hiring a qualified sport surfacing contractor. They are trained and best suited to apply sport coatings, and repair cracks, puddles, and other surface damage prior to the paint and coatings.
https://localtenniscourtresurfacing.com/how-to-paint-a-pickleball-court