Get it from a motor trimmer also, they will sell it in spray can form and in a drum. Get it in the can because you need a nice even coat and it sprays out like spider webs. The drum you need to run it through a special spray gun to get the same effect, I've tried brushing it on but it can soak through the material if pressed too hard and doesn't grab when it's applied thick. Generally 1 can is enough for most cars but I'd get at least 2 for the disco because it's a larger area to cover. Don't use kwik grip in a can or drum from bunnings etc, it dosnt grab like other brands do and dosnt withstand the heat. I've heard good things about 3M super77 brand but never have used it personally, I've always used what the motor trimmer has in stock as its guaranteed to work, it's generally cheaper than mainstream hardware/auto stores and better quality also.
Cheers

