I would like to get a clarification of the statement. "It doesn't much matter what has been in it other than paint, it will all burn out after several good trial burns." Am I to understand that drums that previously contained paint (or primer) should be avoided? If so, what are the specific reasons ?
My thought here is that, if you burn the inside of the barrel out thoroughly, wouldn't any remaining paint be removed? I am sure that you would probably want to utilize a wire brush on a drill to the barrel as well, to ensure all paint residue was removed.
I have access to both drums previously containing oil and paint. The paint ones come as open-top, and were to be my preferred choice, until I read the above quote. Before I make my decision on which to get, I would like to know what hazards barrels previously containing paint pose for use as a UDS.