When choosing paint for your RC model you must first know what material it is made from
RC Car bodies are usually mode from Polycarbonate / Lexan - This is a type of polycarbonate plastic that is primarily referred to as Lexan.
Some of the most popular paint used in rc planes
EPO - Expanded Polyolifin
EPS - Expanded PolyStyrene. This is your basic foam
EPP - Expanded Polyproplene This is another sort of bead foam and is some of the most durable stuff out there
ELAPOR - This is Multiplex's own foam and is used in all Multiplex aircraft.
DEPRON - Fragile easily broken
Foams are best painted with acrylics if you try and paint foam with anything that includes a solvent it will melt your model
Polycarbonate requires a specialist polycarbonate lexan paint