There are various types about. My example is shown here for ID:
http://www.jubileegroup.co.uk/JOS/misc/military_stove_and_pouch.jpg
It's stainless.
The small pan weighs 341g. It has a ridge at somewhat less than half capacity. Filled to the ridge 280ml water. Brimming full 740ml water.
The large pan weighs 552g. It has a ridge at near its full capacity. Filled to the ridge 1340g water. brimming full 1590g water.
The weights include bails/hook.
Obviously you can't boil/cook with the things brimming full, and if I'm hungry (as I tend to be when I'm out and about) I find that cooking my famous corned beef hash with the large pan as full as is safe makes just about enough for a meal for me.
I don't know why you'd want to take the paint off but paint stripper might do it. The stainless pan is in no danger of damage from paint stripper, but I wouldn't suggest you try a blowlamp unless you're going to be very careful not to get the pans glowing. :yikes: