Depends what they are made of, if shiny vinyl, paint can be obtained from car accessory type places for car seats, "vinylcote" I think its called and very good it is aswell, spray or brush, if vinyl canvas, you can get some car hood dye, which could be used, it is also good stuff, look in the classic car mags for that one. Dont know what colours the dye is available in, but certainly blue and black, as I used it on my E type hood.