The Tamiya "PS" series paints (polycarbonate series) etches into the plastic
and leaves a dull rough surface. This paint appears to be glossy only when
seen through the outside of the clear polycarbonate. The etching process
allows it to remain firmly attached to RC car body as it flexes whereas
Lacquers and enamels simply crack and peel off.
The PS paint is also used on metal models and then oversprayed with a clear
or matt coat.
PS may be used on plastic models which have been prepared with Tamiya Primer
or Preparacote.
Better to stick with the Tamiya "TS" series which is a hard lacquer (similar
to Topflite Lustercote) and fuel proof - leave to dry thoroughly between
coats and before exposure to fuel.