I used this product while doing a canvas project at the scrapbook store where I work.
I first used it on some Tim Holtz Grundgeboard flourishes. The end product was a fantastic silver color that looked almost like metal. However, it seemed to take a lot to give an even color.
Next, I used it on the actual canvas, around the edges of my design and it was here where I figured out why it seemed to take a lot to get even coverage. As I was gently spraying the off white canvas, you could see that the mist is very fine (which is good sometimes), but tends to have random drops that are larger and more noticable.
All in all...I think it is a good product if you are covering an entire area completely, but not very good for spot coloring.