Then came the fun bit - the paint job. Most of the colours were acrylics ( hand mixed ) airbrushed over a white primer and white gloss auto paint base. This was then clear coated and polished.
Most of the decals were made by dry transfer ( I am a commercial artist by trade so making up the logos was not too difficult (although this was before computers really came to be what they are today - and these were all hand drawn).
The studio I was working in at the time had all the dry transfer making kit so everything was at hand. The car was then given another clear coat and the final bits added after (aerials etc).