[Synchro909]

If you want to keep it original, leave it as it is. Cars that have been repaired, not restored are wonderful and will always draw the biggest crowds (if that interests you). Repaired so they are safe and reliable but look like they are straight out of the barn stand out from the crowd (IMHO). As they say, They're only original once.
As for choosing a colour, if you must paint it, I suggest you take a colour sample, lay it on a bench and stand a couple of mirrors along the sides of it so that you see reflections and reflections of reflections. This gives a larger area of the colour so you can see better what it will look like. Tiny patches of colour will deceive you, as Tom says.