First, I LOVE the way these look, they are so cute!! I'm wearing them right now and very pleased with how they turned out! I would just say that if you're looking for these to last a long as they possibly can, you're better off removing the adhesive backing and using nail glue to apply instead. For some of the gems, removing the adhesive should be no problem, some of mine were fully or partially removed straight out of the package. If you just want to wear them for one evening, I think these could last long enough WITH a top coat. I know it's a little tricky painting over charms, but I wouldn't feel secure without a top coat. If you want them to last any longer, you have to use a nail glue. I used the charms as is with the adhesive and I also had to use nail glue for the ones that got detached from the glue and most of the ones with the glue tab fell off in the shower. The ones glued on were secure though!