Oil Drum Smoker
Not sure what your barrel looks like, but if you go to Photobucket I have pics posted as I built a similiar smoker this spring. It's under Creating Hog Zilla. I cut the barrel with a skil saw and abrasive blade with out any problems. After I cut the top off, took it outside and did a good burn with some old pallets and oak firewood. It works great, no residue or smell. After we completed the build, had another 500 degree burn before cooking anything in it. Good luck.