I successfully painted my seatbelts,I have a 73 monaro couple ,changed my interior from chestnut to black ,first of all I tried to dye them using Rit it was complete waste of time ,the material is not dyeable and just washes off ,then I tried Viponds Tautflex DIY ,it’s a canvans ,vinyl ,leather paint ,brushed 3 light coats ,they harden up abit so I sat them in some fabric soften for about 45 min then towel dried them ,then gave them a another wipe with some fabric soften sheets ,they came up a threat ,not as soft as they were but very close ,saved myself 1200 dollars buying a new set .