I did a repair to the nose of my b/f's burn and it came out awesome...get some kayak plastic (same type) and a heat gun or plastic welder if you can get one. Heat both surfaces slowly and get the patch plastic heated to the point where its shiny and almost runny. Then you can press the patch over the repair surface, heat the backside of the patch and it will spread like peanut butter. I actually used a butter knife for this part. Be careful not to leave any cool spots in the boat or the patch, also make sure not to overheat around the repair of you may have to go back and patch a much larger area. Be very patient, get stoned first, and have fun!!
PS that creeker has since run OBJ, upper snake, upper 10 mile, and a bunch of other shallow, rocky runs...the boat has taken many hits to the repair but no signs of cracking etc...some of the gouges over the repair are deep but it has held nicely.