Possibly a comb for straightening the fins on AC condensers. They are made in different fin spacing. Here is a link for a similar one on Amazon. Radiator Fin Comb
If you want to fix it, go to an HVAC supply store and buy a fin comb. Won't be but a couple bucks and they can show you how to use it. Reply or PM me your city and I'll link you to one.
Or, here's one on Amazon for $13:
http://www.amazon.com/Allstar-ALL10680-Radiator-Fin-Comb/dp/B006K8GKBO
Might need to be topped up on coolant. cleaned, or similar.
What you're thinking of with the bent fins can be fixed with a fin comb.
https://www.amazon.com/Allstar-ALL10680-Radiator-Fin-Comb/dp/B006K8GKBO#customerReviews
You know they make a specific tool for straightening fins that costs under $20? Would have saved you 3 hours and 55 minutes. Still looks way better now regardless.
There are tools for this: Radiator Fin Comb