Rocket is a wealth of information, but it really depends on what you want your car to look like. Lacquer is OK, (IMO) but...it shrinks, and it continues to shrink, so the wood grain continues to show. Also, if you use lacquer I would stay with lacquer. It does look good at first and will last for a little while. I would not think you are building a car out of Balsa??? When I painted my little cars, I always used water borne...primer and paint and a urethane based clear coat. But those days are long gone, I use vinyl and a sharpie now...much easier!