Tell us about yourself!
lowe's and the home despot both sell new, empty quart and gallon sized paint cans and lids.
any cheap grill with lid would serve well for a smoke chamber...heck even a zip-lock bag would work to cold smoke cheese and such.
This is a nice project, but not very effective as a "heater" the btu's of candle flame is far too small to be useful in that way. you be better served to use the pots as a fire pit or fill them with charcoal for heat. but is does make a nice little dim light.