Pics of the drum. Learning a lot today about drums and how they are refurbished etc.
Reportedly this drum has been put through at 600 degree furnace and sandblaster, unsure of in what order.
Don't know enough about sandblasting, but from some googling, it seems that rougher grey surface would be typical of a sandblasted drum. When I sanded it back a little, it came up with the shinier surface that, in my mind, was what I expected the drum to look like.
Theoretically I would have expected some rust on there, but I think it's just come off the production line. I've run some sandpaper on the internal, and external of the drum and wet some patches to test - hopefully I get some slight rust by tomorrow arvo that would indicate a lack of rust-proofing chemical. If no rust develops, I'll call the guys when they open again on Monday and ask them.
It looks like there is some chemical around the lip that appears to have been on the gloves that the guy who brought the drum out to me was wearing - a yellow chemical, which looks like some kind of oil, maybe a hydraulic fluid or something. You can see the water beading up on it. Hopefully it cleans off with some detergent.
As you can see from the chux I ran over it, there is still a bunch of surface dust on the drum that I think I'll need to wash off with detergent. I think that will be tomorrow's task, which will possibly be followed by a burn in with a weed burner.