I tried doing the velour upper door panels on my Regal just to see if I could get something to work and while I could get the color back I think you will forever loose the "touch of velour" feel regardless of how you apply it.What do you use to bring or put color back in sun faded velour parts? The upper door panels on my Aero Coupe need some attention...never tried to paint/dye cloth?
It seems that the burgundy, reds are the notorious ones when it comes to sun fading.