http://www.forrestrace.com/mosaic-stepping-3/

With mosaic tiling, is it possible to put non-stick cooking spray on the tile/glass for easier grout removal?
I’m new to mosaic tiling and have been creating stepping stones. I was curious as to whether or not using non-stick cooking spray, applied to the tile or glass only prior to grouting, would make for easier clean up of grout from those surfaces after application of grout.
Maybe a little Vaseline. Lots of elbow grease too.
Mosaic Stepping Stones