Originally Posted by KentuckyKawi
eventually hitting large bumps or some rought terrain will allow the crack to continue spreading down your plastic until it becomes extremely noticable. ask me how i know.
One more thing:
To keep the crack from continuing to spread, get a small drill bit, and drill a hole at the end of the crack. Aircraft mechanics do this all the time to prevent sheet metal cracks on the aircraft's body from spreading more. This technique works on metal, fiberglass, and plastic.
Drill the hole with a regular drill bit, then do your repair with epoxy or whatever adhesive you decide use.
All you want is a hole like this: