Use shellac as a fuel and a binder in star compositions. Solvents are alcohol and acetone.
"It can be used in both aqueous-bound (as fuel) and alcohol-bound stars, and that in the latter it can be used to produce a much harder star than with red gum -- with which it can also be mixed for compromises on color production and burn time. Hardware store shellac alcohol solution gives inferior results in stars, for reasons concerning what happens with shellac after being dissolved for a while in alcohol.
With enough drying time, a shellac-bound layer is a fairly good isolating layer against water-bound compos. Many chlorate color comps go better with shellac than with red gum." (Thanks to Rob Good for this.)