Some of the ones that smell like nail polish say to wait 20 minutes then apply the second coat, then wait another 20 min and apply a third. I've tried that and found it doesn't work. The second coat doesn't like the earlier coat and the third coat just goes crinkly and totally rejects the second coat. I've found the only way to do it is to spray a medium coat on, wait about 5-10 mins, then apply a final coat. Then leave it at that to dry slowly in the shade and hope for the best.
Some of the automotive paints I've used say to wait 5 mins between coats. I have never had any problems with them. I usually just spray on an even, fairly solid coat, but not so heavy as to cause runs, then apply another lighter coat in 5-10 mins time. Always works a treat.
Maybe I just have an aversion to nail polish.
P.S. I wonder if the paint that smells like nail polish will last about as long as nail polish? I suspect that probably will be the case!