Combine the water and candy melts together in a bowl
Heat the candy melts and water in a microwave for 30 seconds or until they are melted
Stir until smooth
Combine the gold dust and oil together and mix until combined
It should be a thick paste. If it's too thin, add more gold powder. If it's too thick, add a drop of oil.
Coat the bottom inside of your piping bag with the gold mixture.
Add the water ganache mixture and pipe!
Notes
You can use any color dust you want for this techniqueMake sure your water ganache isnt too hot when you pipe it onto the cakePiping onto a cold cake works best