mrclean is right,
heres what i have done with no problems.
when you spray that coat of clear I was supposed to spray weeks ago, i over reduce the clear just a tiny bit, or mix accordingly with the slowest reducer i got. then, i make my first coat a nice light piss coat. what ever you want to call it. just put the clear on very lightly so that it acclimates with the pervious coats, but doesnt "shock" them. let it tack up, and the proceed as normal. i make the next coat a little heavier, then the 3rd what ever
this process may not be needed, but id rather be safe than sorry.