I got a 55 that had hydraulic fluid in it. Is it OK to use with a popper burn out. I have about 4 pallets..
If you could find a food grade barrel I would buy it instead but if that barrel is all you can find then it can be used with a little bit of extra work. I personally wouldn't ever use one but I have food grate barrel available to me and for some people that isn't an option so you have to make due.
Clean it, burn it, season it, and cook on it.
The only thing I would check for is to make sure it does not have an epoxy liner. So long as there is no liner, its no different then a fuel oil tank or a diesel tank. Slightly different then a propane tank but not much. Both of the comp rigs I cook on are old diesel fuel tanks.
There are many options to clean it, I used dawn dish soap, you know,,,, the one that cuts grease lol.
Good Luck which ever way you go.
What Tom said^^
If it does have an epoxy liner you either get it out the hard way with a grinder and wire wheel or what I did was have mine sandblasted for $20.
Get to building, we need some Qview!