In most cases, we recommend applying PPF over panel that is defect free and you get the best protection money can buy on day one. There is nothing wrong with applying PPF over paint defects, however, you will see slight air pockets around the defects (this includes areas with touch-up paint applied) and PPF will magnify the imperfections. We offer various cosmetic repair options such as Paint Correction, Polishing, Touch Up Paint and can refer out to reputable body shops for any paint and body work. Think of applying screen protector on your cracked smart phone screen, you get the idea.