Don't apply wet coats- it's pretty simple.
Apply TS13 in mist coats, and leave plenty of time (1-2 hours) between coats. After you have several mist coats built up, you can move on to heavier mist coats. But if you spray it on wet, you're asking for trouble. It's not the sort of thing you do in one session. It's wise not to try to do it all in one day (or even in one weekend). It's not hard, but it really takes some patience. Like modeling itself.
