I looked around the house and found Zap (Home Depot Brand) wood floor cleaner in a cabinet and tried it. I used non Martha Stewart brand fine glitters and it worked just fine (pun intended.
My non crafty brother in law even did one! (His turned out the best of the bunch! And it was pink!!) These were super easy. BUT I am glad that the clear balls I had were nice sturdy ones from Michael’s. They are meant to be handled and crafted with so they are thicker. You can take off the hook cap easily and the edges are smooth, not sharp.
I have worked with other balls that were much thinner with sharp edges under the cap. Again this year I sorted through all my old xmas balls and took out the plain colored ones that were scratched and old looking. A rinse in dishwashing liquid soapy water and the outer color comes right off. A soak and a swish (I used a bit of paper towel inside for agitation) with bleach water takes the inner silvering off. BUT the opening is often jagged sharp and the balls are thinner are require more delicate handling. A good trash to treasure thing but not exactly a good kid craft.