How do I make a wax seal with a spoon and candle?

Prepare your work space and gather all the gear you're going to need: wax sticks, your wax seal stamp, melting spoon and candle and the material/s you’re adding wax seals to. The wax is sticky, so be sure to protect your workspace and yourself [wax can burn you, and it’s extremely difficult to get out of clothing!]
Cut a 10-12mm piece of wax and place it in your spoon. If you’re making a few seals, cut the number of pieces you need in advance. Or, you can just place one end of the wax stick in the spoon, and hold the other end while it melts.
Light your candle and hold the spoon above the flame [not touching it] until the wax is almost 100% melted. Remove the spoon from the flame, and watch as any remaining wax is melted by the residual heat [you can speed it up by giving it a gentle stir with the end of a paper clip].
Once melted, pour the wax onto your chosen surface. There should be enough to make a circular shape around 15mm diameter.
Then, while the wax is hot, press your stamp gently into the wax and let the stamp rest on the wax while it sets [around 20-30 seconds].
Once the wax hardens, gently lift the stamp off the wax. You might need to give it a little wiggle. Et voilà! Your first wax seal!
If you’re done, give your spoon a wipe with a paper towel or rag while it's still hot to remove any leftover wax (be careful not to burn your fingers!). Or, add more wax to repeat the steps above.

TIPS

Try to avoid overheating the wax (it’s getting too hot if it bubbles or there’s lots of smoke) as it can make the wax too runny, or the excess heat could make paper surfaces buckle. If your wax overheats, take the spoon away from the heat, and let the wax cool down.
If you're making wax seals in bulk, the brass will start to heat up, making it harder to lift it off the wax. In this case, you can cool it down with some ice or a little bit of cold water (make sure the stamp is dry before you use it again, and avoid getting the wooden handle wet).