Hi castagnos,
There are many ways to use transfer wax.
A very easy way is to rub a little on the metal, dust with white powder, chalk dust or corn starch and draw your design on it with a pencil or rounded scribe.
Another use is to scribe your design into a clear plastic, rub a little wax into the line, dust with white or black powder depending on the color of your metal.
Place it on your metal groove side down and burnish.
There are dozens of other ways to use transfer wax and I think you will find many on the Cafe if you do a search.
Hope this helps, best wishes, John B.
be very careful with sams' wax ! never, ever- get any of this stuff on your head or eyebrows! i'll give you his formula :: 2 parts beeswax- 7 parts nair- 3 parts juice from a green lizzards' gizzard.