I have quite a bit of Hobby Lobby glitter. Some of it is color-fast and doesn't bleed at the working temperature but will curl if the temps get much over 350 degrees. Others are good and don't bleed or curl. Some will do both. If you are going to try the aftermarket glitters by small packages to try. You have to be the judge. Everyone does things "their" way and what might work for one person might just deal fits to the next.