Best Epoxy??

3M 8115 A.K.A panel bond......i love the stuff, i use it for everything after it sets up you can sand it, grind it, drill it, paint it. it wont stick to duct tape so i have used duct tape to make a mold for stuff and actually cast plastic pieces with it.

its automotive grade so you can use it on the outside of the car in the elements....i have use it to repair grilles, steering wheels, consoles, plastic bumpers on newer cars, plastic mirror housings on newer cars...ect. ect..