The vynil spray works well on interiors, we did a AE86 sprinter from the brown to black, looks like its always been black.. quick qipe down with thinners and away it goes...
as for colour combinations, you'll have to look at whats available, here is the VHT range
Colours available: Gloss Jet Black (SP941), Black Satin (SP942), White Satin (SP943), Buckskin Tan Satin (SP944), Chocolate Brown Satin (SP945), Silver Satin (SP946), Red Satin (SP947), Burgundy Satin (SP948), Dark Blue Satin (SP950), Medium Blue Satin (SP951), Light Blue Satin (SP952), Light Grey Satin (SP953), Charcoal Grey (SP954), Saddle Tan (SP955), Midnight Blue Satin (SP956), Dove Grey Satin (SP958), Dark Rose Red Satin (SP959), Camel Tan (SP960).