Quote Originally Posted by wilfy View Post
i'd find of source of TFR (traffic film remover) this is the stuff they put on at the car wash to remove tar ect off your car.. i used it to degrease an engine bay that had a cracked sump leak all over it before painting and it worked wonders, very little need for any elbow grease
I manufacture TFR it's just a strong Alkaline detergent and won't touch Tar. For that you need petroleum based product, Kerosene works good for Tar.
Any strong washing up liquid washed with hot water will work. Good TFR is pretty much strong washing up liquid(detergent) with foaming and rinsing agents to help with streaking, cheap ones are very caustic based and dull paint.
If you do go in search of TFR try a truck wash because truck wash is very strong being strongly laced with caustic soda to aid cleaning.