2 coats of clear is more than enough, you don't want it to turn out too glossy which would look kinda weird.
i've been experimenting with my tails too right now...and i first tried using the krylon stained glass paint in red. after 3 attempts i can safely say that paint is pure crap. it bubbled up & gave a "wavy" texture to the lens every single time and though i sprayed very light, it would come out so red it looked black if you know what i mean.
so i'm going back to my most excellent spraying testors candy apple red and seeing what kind of results i get from that. i guess its a good thing the tail i have been practicing on was an extra that i picked up off ebay for $10
post pics when your finished, looks like you will finish way before me
I'm already done, I'd just like to lightly sand it a bit more. I'll take some pictures tomorrow though.
The clearcoat suggests a 24hr drying period to prevent finger-prints. I carefully, so not to touch the painted part (I taped mine off so the black edges wouldn't get sprayed) reinstalled my tails. I figure if anything, outside is cleaner for them than on my basement floor.
Suffice to say, I got a glimpse with a flashlight, and it looks quite good.
Let me know how you make out.
BTW, I did 2 coats of testors and 2 coats of clearcoat.