Its all a bit expensive. [£10 for a 3mx1m pond liner is the cheapest I've found]
Its for an old nato fibreglass and plastic box which was used to transport radio equipment.
Quite heavy and sturdy. Still got the O ring around the inside edge and is waterproof. with ten screw down locks.
Quite large as well. So will come in handy for axes, and bow saws, as well as other tools.
The inside is fibreglass, covered in a grey sticky material, which Ive mostly scraped off, with heat gun/thinners. But its a mess, and needs lining before I add tools. [could have been some kind of insulation, but was like sticky chewing gum.
I may end up cutting up rubble sacks. Or maybe those old royal mail sacks, grey, made from similiar stuff to the garden sacks the council leave you for green waste.
Unless anyone has any other bright ideas what I could use?