Roller lang gamit ko sir, pero may workaround ako for smooth paint results, i added more water and apply very very thin multiple coatings para maganda texture ng paint job. But nothing beats spray painting, this PJ deserved the best paint application.
Dati, I used water-based putty flat white to smoothen the plywood surface, it seemed its not good enough for SFv2. I'll check out the MDF or hardiflex this weekend, masakit sa likod ung sanding and applying putty.