Sorry for the worryingz..but, don't be it's just I'm a bit of a ''research for the best of bestest solution'' and a perfeccionist *on some subjects* so...
I have read a lot of people use the glossy mod podge for glitter finnishes..and for that purpose I have never heard of any other method, for sealing the glitter that is... Cuz any other way they go everywhere.. And yeah, Testors will Dull the glitter's shine *ba dum tss*
If you haven't had problems yet I guess you're clear
. A lot of ppl here use mod podge and swear by it.. I guess its a hit or miss... Mod Podge is the ultimate mystery ...