This a Scalextric Williams with just the Rothmans red and gold tampo removed. The blue and white tampo are as was. From then on it is easy to decorate it as Alain Prost 1993 world championship winning car. The yellow is a painted clear transfer, all the others came from a sheet available from Scale Models, except one, the sega cartoon feet were photocopied from a magazine onto an address label, it is a bit pale, and I will redo it darker, but as a stop-gap, it works fine.

This is such a simple conversion, it is really strange Scalextric themselves have not tried it.