Yea me too, once its dry and not so smelly I will try to get in there and really search for it.  Part of the reason I want to do a second coat is just to put a nice layer over and piece of that that is exposed.   I was so mad at myself when it happened, but I was hurting myself more wasting time trying to fish it out and failing miserably.

I mentioned this in the novel I wrote in Post 24: the coating has what's called a crosslinking agent in it.  The solvents (MEK, acetone, etc.) that carried it in to the tank will be gone pretty quickly but the chemistry might take a little bit longer.  I'd keep it somewhere warm so that the crosslinking chemistry (curing) can complete and make the coating durable.  Put it outside in the sun and let it bake.  If it's well covered inside I wouldn't put another coat in, the strong solvents in the second coat might cause the first coat to swell and come loose from the tank metal.  Then you'll have a big floppy balloon of Red-Kote in your tank.

22 minutes ago, DaveR said:

Things were going great... until they weren't.

Ain't that the truth! 

I wouldn't worry about the thicker part.  Give it a week to cure.

I am leaning towards Zed's position. Many coatings once cured don't take a second coat well with out scuffing, which is impossible in this instance

I think it'll be fine too.  Let it sit in the sun and bake a few days then slide it under a table or something for a couple of weeks.  If you'll put a clear filter right out of the tank they'll catch whatever breaks loose then replace them, cheap and easy to do.