Just getting ready to paint my spindles,A-frames ect and thought Id pass this on as Ive done this for years using single stage enamel.I thin it with lacquer thinner same ratio as the directions call for enamel thinner---it dries fast -shines well and the dry time goes from hours (days) to a couple hours depending on heat humidity ect of course.I used to cut in fenders,doorjambs ect when installing new parts that needed to be painted one side or the other.
Havent tried this over epoxy primer-will let you know as Its my first time here trying this.
OH the opposite does not apply-you cant use enamel thinner in lacquer---instant snot!!!!!!

i don't think so???
post pictures of your finished product

I used acetone with epoxy primer, thats what the manufacture recomended for fast flash time.

I believe thet they are often reverse compatable, but not the other way (laquer thinner may sub for enamel thinner but NOT enamel thinner for laquer thinner).