Thread: Flux and casting

Candle wax will work, as will beef dripping and beeswax. There is no set ratio a blob about fingernail size is good for most, more takes too long to burn off.
The Flux is just there to bind impurities like dirt, oxide, and other contaminants floating on the surface together making them easier to remove.
To stop the smoke a match will ignite it and it will happily burn.
The advice on moisture is good, I always leave molds, ladles, and scooping spoon by the pot to heat up. One extra caution I would add if using beeswax especially in summer is the smell can attract unwanted visitors like wasps and bees.