Clear nail polish, by the way, has no longevity (I found that out the hard way) so until I order in some Sculpey Glaze, I left the rest unpainted/unglazedI'm not sure why that happened (and what exactly did happen re "longevity"?) since all air dry clays should be fine with most all clear sealers (or acrylic paints, etc), including clear fingernail polishes, as long as they are completely dried first. Since cold porcelain can take a more than a day (or even up to a week to thoroughly dry), did you perhaps just coat the cold porcelain too soon?
I didn't suspect it would take longer than a day to dry actually. I glazed them over the next day. The reason I said that it doesn't last long is because for the one piece that I glazed it with and
wore, the polish wore away and the paint underneath started chipping off. I figured that it was because I used nail polish since... the same thing happens on our nails.
This is it only three days of daily wear (showers included... maybe that's why?) :
I'm definitely looking into polyurethane! THANK YOU for making it so much more simpler. And also for your tips and those links, they contain loads of useful information - I've been checking them out since last night!