Friends:
FYI - I found a very close touch-up paint for the 750 Paso bikes. These are hard to match, having used an atypical paint that is not only a lighter red than later Ducati's, but which is layered on top of a white or even pink primer.
The paint I found is a GM replacement color made by Plasti-Kote, and the listed number is GM 3902.
Its not exact, but very very close. The paint is thin, and the applicator is cheap, so I used a q-tip.
Brett
