100ml Can of Tamiya Red Polycarbonate Spray Paint.
These spray paints were developed especially for decorating transparent polycarbonate bodies used in R/C car modeling. Paint the body from the inside, keeping the can about 30cm from the surface. After curing, apply another coat. Small details should be brush painted beforehand using Tamiya bottle paints for polycarbonate. These paints are impervious to oil and fuels, so they can be safely used on gas-powered R/C bodies.
Never use these paints on plastic models.