[PEGASIX]

no matter how much bondo you put over the silicone it will still fish eye any paint layed over it. unless you used paintable silicone which will hold even less.
body adhesive is paintable and sandable. its not cheap but will get the job done in the safest way at this point. sectioning the quarter would have been alot easier but its to late for that now and the factory quarters are held on by the panel adhesive and spot welds.

as for the keyboard warrior. everyone is entitled to there own opinion but my projects and builds speak for them selves.
http://www.kentonlinecatalog.com/guide/K...og/1-1.asp#
sections 1.2 thru 1-5 and sections 1-27 thru 1-33
or
http://www.kent-automotive.com/webimages/E306K.pdf
take your pick. just make sure you get one with enough workable time to be able to set and align the quarter