R&J Custom Auto Detail is a car wash and car detailing service in Fontana, California, at 6183 Sierra Ave. building 2, Fontana. Opening hours: Mon–Sat 8:30 AM–5 PM · Sun Closed. Listed services: Identifies as Latino-owned and Gender-neutral restroom and Appointment required. Call (951) 233-4955 to check prices or availability before you go.