Anyone here have any experience with colorite paint..?
Nope.
I've used colourite for some touch-up paint for an old Honda. Not sure it was a 100% match (definitely good enough) - was for a 30 + year old bike after all - and would be fine for a reproduction paint job.
Painted a buddied Norton with Colorite. I think is was DuPont paint. Good paint but the cost is crazy.
I've used it for touching in on my E-2. Good stuff but expensive.
For a bike over 20 years old its paint colour might have faded a little, so getting a colour match at a paint shop with the measuring equipment might be a better bet.