is to soak the rubber spoiler itself in commercial painting "wax stripper" that is used to remove wax and oils from paint prior to repainting a cars finish. this draws out all oils and conditioners in the rubber(def.do not reccomend thought!)and use interior "dye" which is realy a highly flexible polymer paint. I couldn't garrantee this will hold up to the elements, although when on your seats, it holds up to sun/extreme heat/and wear due to you sitting in the seat.