Hi Sheryl,

I did a test run today, quite pleased with the results for a first try.
I used small water ballons, they are perfect size.

I think I need to make the mixture a bit thinner next time (more water) as I see a lot of clumps / residue.
The blue one is verry visable.

I cheated a bit on the drying time, I used an hair dryer to speed things up.