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unless they already know what is there, and where it is. In which case your security has already failed.

I think you've been over-thinking that one, Trout.
Why would you want to go to the trouble of "putting a big dob of fibreglass around the bolt head/s"? If the miscreant has managed to get the safe...

Common sense ain't so common any more. And was it police, or some numpty civie "vetting officer" who knows nothing about reality?

Go to the NZ Police website and look for the document titled "Secure Storage Guide for Firearms and Ammunition". The current iteration, I believe, is Version 3: February 2022. Everything you need to...