Header coatings, how necessary?

Done the VHT gig,strip the black garbage off,scotchbrite the header,heat & paint.Would get 1-2 years,before needing attention. Have a set of factory ceramic coated Hooker headers,with the car I have now.The ceramic coating,holding up after 11+ years. Depends on the pocket book. Usually cheaper to buy them already done. Jet Hot does do inside and out. Back to the pocket book.