So I bought Thunderbird quick drying poly and thinner.  Do I just put the quick drying poly on by following the directions on the can? On their site, it says it is a two part finish.  Am I missing the other half of the finish?

I can not find anything on the can that says it is part a or part b.

You got the wrong material. The Thunderbird you have is for arrows. They also make a two part Thunderbird, A and B, that comes with the thinner for mixing for spraying bows. I can't find their website but if you look on the can it may have it listed.

tbirdarchery.com

Yep, sounds like you got the one part poly arrow sealer. You want the two part epoxy bow finish. Completely different stuff.

Thanks, Jeff
http://www.tbirdarchery.com/

Oh man, that really sucks.  I take it that the finish I have is not good for bows then?  Anyone tried using it on a bow?

I have used it on bows with good results. One draw back is if you are doing a refinish or touch up job you should sand all of the old finish off because it goes on as a lacquer then dries to a poly. Lacquers dry really fast and are known to lift or wrinkle old finishes as they evaporate. If you don't have ideal conditions to spray your bow the poly is a good choice because it dries so fast. With the epoxy, it dries so slow that any dust, flies or an occasional low flying B-52 may find it's way into your finish. The epoxy is a tougher finish though and touch up is easy.

I use the one part Thunderbird that comes in a spray can and supposed to start as a lacuer and end up as a polyurethane.  I'm pretty happy with it.  Bob Sarrels uses it, too.  I put three coats of thunderbird gloss, then after the conversion, I put one or two layers of miniwax polyurethane satin over that.

I've used that T-bird finish on numerous bows for years and it works great.  It dries fast and is very user friendly.  What is also great about it is that you can spray a store bought poly over it for touch ups with just light sanding, no need to remove the entire finish.  3 or 4 coats of this finish is very durable.   I like the finish so much I've used it on numerous furniture projects as well.  I built a stand for a large salt water aquarium and that finish has held up to the salt water for about 7-8 years now.  Good stuff  

My bad.  The stuff I use doesn't come in a spray can.  It comes in a pint can.  I use a Preval sprayer to spray it on after mixing it with 20% thinner.

Awesome, thanks for the info guys.  Sounds like it actually might work better for my current conditions.  I'll try the right stuff once I use up this can. Thanks!