As far as I know the "no silicone" restriction is for fabric coverd aircraft only as it makes it imposable to glue patches and repaint as the silicone gets into the fibers of the fabric and you can't get it out.
If the paint on your aircraft is good then I would recomend "REJEX" .
www.corrosionx.com/rejex.html
I have been using it for about a year now and it seems to do all that the makers claim.