To address your primer cure comment:
That specific primer in the picture is a hot solvent based primer (acetone, xylene, toluene, laq thinner, etc). When using this specific Krylon product you have a couple windows in which you need to work. Within one hour you can continue to recoat the primer or top coat with a hot solvent top coat (ie Krylon flat black in the picture). Otherwise you MUST wait 24 hours before top coating. I commonly see/hear complaints from customers who do not operate within those windows and encounter wrinkling/lifting problems as a result. What happens when dealing with the above mentioned solvents is they have a an almost "melting" characteristic to them. They are hot enough to re-wet the surface and cause lifting, wrinkling, solvent entrapment, blistering, etc. At that point you will need to solvent wipe and strip to the original substrate and start your project over.