Here's a great and inexpensive tip for gold leafing and chroming at scale... every year around Easter time you can find metal foiling kits for Easter eggs... they work great and are the same material that is used for Gold Leafing and Chroming kits.  But as a bonus you also get different colors as well... here's a video I made about them.

[youtube]https://www.youtube.com/watch?v=1TVWkE_ke_Y[/youtube]