Can use Future floor wax as a glaze. Makes item really shine and is quite durable.

I *think* you have to be careful about spray sealers. Something about the propellants breaking down the clay...

I haven't looked at the project; do they recommend a glaze to give the item a shine? I personally like a matte finish most of the time. But I finished a Sculpey project the other day and it chipped when I put a jump ring through... I was wondering if a sealer would help with that. I think Sculpey is just naturally brittle....

Sorry I'm not much help! Just be careful about the sprays; and show us your stars if you can!

I'd go with the Future to be safe and it is inexpensive, too, in comparison to tiny bottles of craft store glaze. It bonds well with the clay and adds a nice shine. If you work with wood you might have some Flecto Varathane Diamond Finish which is also good. Things like spray varnishes or clear nail polish get a reaction with the clay and become sticky over time.
Sealer does not really help with breakage. Sculpey is the weakest & most brittle of the clays. Try gluing the chipped piece back on with Sobo glue, then rebaking to fuse the glue to the clay.

Thanks for the tips. Good to know that my wood spray sealers wouldn't work before I tried using them. Hate to just about finish a project and ruin it with the last step. Though I've done that a few times already. :o( I'll try to post pics if I can figure out how to and how to use my new camera. Haven't tried it yet. So much to learn and so little time. LOL
Thanks again.