In John's own words: Attached is a model I delivered to one of my clients last night. It's a Clouser cast epoxy Illinois Terminal suburban car (470-473) in 1:48. I modified it by blocking off the upper sash, making the pilots, trolley hooks, and installing all other details such as underbody equipment, trucks, and an interior. Principal color is IT's "Tangerine Orange." It has a slide switch underneath so it can run two-rail or off the overhead wire. You can see why this paint has become my standard.
John Nicholson is a custom painter who uses Tru-Color Paint for his business. John uses Rust-oleum Professional Grade Lacquer Thinner from their Auto Paint product line to thin the paint for spraying multiple light coats. He uses a mix of 55/45% paint to thinner and then a hair dryer is used to help set/dry the paint. I would still recommend storing Tru-Color Paint with Tru-Color's own thinner as the soft plastic bottles do loose media (thinner) over time.
John also uses Model Master Primer for models made of brass metal and then uses Tru-Color Paint over that base. He uses a mix of 80% primer to 20% distilled water. I would expect Tru-Color's own Primers (both dark and light) to get the same results.