HELP drying time for engine paint?

I bought some engine enamel from "Paint Man" and gave the engine its first coat at 12.30 this afternoon, how long should it be left before its next coat???

Cant find any info on drying times on their website and dont want to apply the second coat too early as i hate it when it never seems to cure properly!

would it be best to leave it 24 hours??

Looks good in its new coat of paint

Starting to come together now, will dig out a picture of the engine when I started