Back from holidays and I colour sanded and buffed the paintwork last week. Everything looks great for being painted in sections. I was very careful to intermix the various tins of paint and finished up the last of the final tin on the doors.
Hmmm, is the door darker than the wing or the wing lighter than the door?
Being a pearl colour the light, gloss level and bodywork angles make a vast difference to the perceived colour so I could only be sure all were correct when buffing was complete.
I had my suspicions a few weeks ago when I saw this view
And even more suspicious with this one
Buffing just made the colour match better so sanding back both door and wing to remove the gloss was the only way to check.
I reckon that the bottom of the final tin had some un-mixed red pigment and that has given the doors a slightly more violet colour. The only answer was to buy more paint and respray both of the doors and rear wings together, fading up to the roof and boot lid. The shape of the front wings disguises the colour variation extremely well so no need to re-paint them.
All complete now just buffing to do but the result is an excellent match and the colour fading has worked a treat.