I think I have located some free barrels in excellent shape, but I am not sure if I should use them. The barrels have contained "Water Miscible Blanket & Roller Wash." Specs can be viewed here (N-282):
http://www.novapressroom.com/products.cfm#N-200 Medium Dry Series
I found another thread from here on the forums from about 6 months ago regarding this, but there doesn't seem to be anybody responding on that thread that knows definitively whether the barrel would be safe or not after a good burnout.
What do you guys think?