Hi I am making the machine dmt vaporizer and I got some chore boy copper mesh. I burned off the residue oil in a gas flame from my fire place. It was hot enough to glow red on the tips of the copper wad. Now the copper is mostly dark brown and tiny copper flakes can be seen on my hand if I rub it hard enough. This might be a dumb question but have I done anything to the copper through the application of heat that would make it unsafe to use as a medium to vaporize through? I dont want to be inhaling any fumes or dust that I shouldn't be. Thanks!