fyiβ¦.I recently repaired  bolt mounts  broken off my   ETEC lower cowl  halves with great a success using  this stuff and then covered up with Permatex plastic  welder (2 part mixt seringue)  imbedded with a  layer of fiberglass cloth 
https://notaglue.com/
3 seconds under UV light  and the  glue sets hardβ¦ just like  tooth repairs at the dentist …without the dentist $$$$$ π 
then you just add a layer over the cracked plastic followed with the  UV lamps supplied   followed  with the Permatex  layered  FB cloth 
saved me buying  2  lower cowl  halves totaling  around  $1400 cdn incl taxes   π  π  π  π
Joining AOMCI  has  priviledges π