As a bit of background, TE, a load of us discussed this a lot thinking about the Fyfield Down Polisher.
As Rhiannon has said in another post, that may be a bit different, being in a relatively 'busy' place so near Avebury. But as she also said, the info's available by asking or by more research - the idea being that it's harder for a casual vandal to come across.
I don't think that's unreasonable, but as I don't know the axe factories etc yr talking about, I dunno whether the same precautions might be sensible.
love
Moth