Add to the list Strontium Chromate, that was in little bags clipped along the bottom of the Nimrod fuselage under the fuel cells that had to be replaced each Major servicing, always wondered why the old stuff was put in a plastic bag, then put into a 'Coffee' tin and the lid soldered shut before it disappeared somewhere for disposal, but we were given little in the way of instructions for PPE required, other than rubber gloves.