I wouldn't think you need to do a full burn out but you might want to put some charcoal in it to get it hot enough to burn off any residue the blaster might have gotten on it and then season the inside with oil so it doesn't start rusting on you.
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I used non stick pam. You could wipe it down with any veg. oil or even peanut oil. Whatever you have handy. It's kind of like seasoning cast iron.
Just coat it for now to keep it from rusting. You will need your charcoal basket to season it.
unless your basket is ready, you could do it now if it is. You want to be able to season the bottom as well as the sides so you need your basket in there. It wouldn't hurt to have your valves installed and the lid and all that too. You need all that stuff for it to work.
as long as the lid will sit on there for the seasoning just so you can control the temp. and cut off the air to put the fire out when you are done. Hence the valves and lid.
That's what I did and when it was done it had a nice glossy layer of oil baked to the walls.
well i got the new drum all fabed up and got in a good 4 hour seasoning run, leaks a bit from the lid area but i think once i get a good layer of residue built up in it it should be just fine, just need to paint the outside and it will be all done.
An ash pan is a must. Not just for the ashes but for the grease too. I couldn't imagine trying to scrape out that congealed grease and ash paste from the bottom of the barrel. I have to use a paint scraper to get it out of my ash pan.