Duracoat is crap...it's not durable at all...it's just expensive Sherwin Williams paint.
If you want something durable, you need to get a thermal cured finish...IE Norrell's Moly Resin aka KG Gunkote, or Ceracoat. The last three finishes require you to bake them in an oven for 1 hour.
With the Duracoat, it may take 3-5 weeks to fully cure since it's an air cured product. I heard that Duracoat offers "durabake" now...so that would be a better option.
The best protection for your firearm is to have the item parkerized then use KG, Norrell's, Ceracoat.
Robar's NP3 is also a very tough treatment...but it's pricey since you need to send it off to have the NP3 done.
I haven't used Ceracoat, but I have used KG and Norrell's quite a bit. The big advantage with Duracoat is they offer a ton of colors, since it's just like krylon...but the finish is not durable.
KG in OD on my lower
Norrell's FDE
KG on the action/barrel