sounds awsome,but a copper coating is acctualy worse for you,it means an adhesive may have been added,and copper does vaporive at near the same tempature weed combusts,so even weed burning is it will activate the toxins,if you can i'd recomend getting a new bowl,if not then(and this may take several days)vaporize the copper,it will get thinner and thiner but like i said it will take a very very long time(and we all know stoners are imapatiant )