Bryanlee, we feel for you mate! i was in the same position the first week i got my car 3 years ago.
it s a nice car so they decided to dig a deep line along the bonnet for me.
so what i did was telling all my friends in the area if they know or hear anything, ill will deal with it very personnally. which is not a very good things to do, but i hope it did shit the d**khead in the pants though.
for your case, please think back if you have any conflict with whoever that knows what you drive and where you live. fellow cars lovers like that rexie owner wouldnt do such things i dont think, but again it may be personnal you see.
ron
p.s. gap filler or liquid nails are only 2 bucks . and think about it they came planned, not to steal but to vandalised, cos i wouldnt walk around carring a caulkgun!!!!