Candy apple paint

if the basecoat does not require hardener or to be mixed with clearcoat, it will be dry and ready for candy coat within 15-20 minutes, as for the actual candy coat,some are done with regular binder and should be sprayed like regular basecoat, some have to be mixed with clearcoat, which brand is it ? If you waited more than 6-7 hours ,you're too late and will have to scuff/sand and may have to start from the beginning