they wouldent put ---- like that in there kiln. there expensive as hell. glaze is diffrent than ceramic coating it doesnt get hot enough and in biqsue fireing you would ---- the kiln up from having the metal in it.


you could always do it the orignal way you fire ceramics.

throw some coated peices under some logs. catch them on fire
keep a fire burning on top of them for like 5 days straight. slowly let the fire go out so theres no cracking.

sift through the ashes and find your melted parts you tryed to coat. ---- i dont know. but i do know a school wouldent touch that. thoes kilns are expensive as hell to fix. and they get pissed if little things like glaze drip on the firestone.