[Monkey Wrench]

I used a tandy leather product, it worked very well tandy and radio shack were united, Im not sure if tandy still exists.

I think a paint sits on top but a dye absorbs so I'd be trending toward a dye.
I also bought a product to make it shiny, it worked fine but I did a dashboard and found glossy caused annoying reflection. ok on seats I think .

for vinyl I use vinylhide or was it vinylhide? might be a similar name, years back.. it came in spray cans, melts into the vinyl and it lasted very well. I dyed tan and green seats black and it never wore off at all. even did a headliner, in place. nasty job spraying it upwards but it worked out well.