You've got a choice really mate, you can stick it on so it never comes off with a bit of no nails an epoxy resin or something like that or you could just stick it on with a bit of silicone, it wont be permanant but it will survive car washing and be waterproof. When I had my 16V some little f*ck Witt stole the badge off the back and because it was so well fixed they scratched the sh*t out of the back panel as well. When I put another one back on I decided not to fix it too well so if the same thing happened it would come off without recking the back panel again.
