Read the links. I just bought all the crap to do this with my shark tooth grille. The epoxy shown in the article is not available, I guess. I researched the stuff available and bought SEM 39767 from an online store. It turns out my local Bumper To Bumper had it on the shelf, although at a higher price. The stuff is not cheap, but it's not hardware store epoxy, either.
You're supposed to use a SEM leather/plastic prep, then sand the area to rough it up, then apply. I haven't done this yet, but plan to this weekend or next. Tried the super glue/baking soda fix, and it was alright, but not as strong as I need for actual structural repair.