I was lucky that I have a friend that runs a big bakery here in town and he got me a couple drums that are only used for Veg. Oil some areas are tough to get barrells without the lining in it. Reconditioned barrels are good as long as they dont have the lining in it. If your forced to get one with a lining dont try to sand it yourself, just pay a shop a couple bucks to sand blast it (remember after sandblasting u must paint right away or it will start to rust within a half hour)www.mcau.net/pics/food.html
In one of those pics u can see the current drum smoker I built and the one im working on. The second one looks the way it does cause I burned a few skids and some logs in there to heat and burn the paint off the outside of it, now I will only have to go over it lightly with some sandpaper by hand and then I can paint it with some high heat oven paint.
If ya need any other pointers let me know I learned all the mistakes on the first one, even tho it cooks good the second one should be the harley of drum smokers