I have put 2 teaspoons of tin oxise in a 1/2 litre spray bottle with a few drops of dishwashing detergent. So far it works well, but the president of our lapidary club said that they stopped using these in favour of making a thick soup to apply with a brush, becausepeople didn't shake the bottle and the nozzle clogged.
on my faceting machine I use 1 teaspoon of cerium oxide in the same quantity of detergent and water. But I am using ahard lap instead of felt wheel with extra water.
regards
Gordon