I wa kinda wondering the same thing.The barrel above was used to hold sealant which is in a bag inside the drum.So, this is basically a brand new barrel as nothing has touched the sides of it. I think it is what they call and "innerpack" barrel and is EPA legal to haul stuff in, as in whatever you may desire.
I did the burn last night and I am going to empty it today and see how hard the stuff comes off after it is burned.
Norcor, I didn't leave the lid on all the time during the burn. I don't think I could take a thermo for the deheader.It is to much of a useful tool around the shop,whether it be for trash barrels,trash burn barrels or possibly future UDS builds. But, anyone in the area sure can use it if they want to come over.