thank you Pappy for the vote of confidence. But what restoration I have done, has been just my own pieces... I'm happy with the results and run them on my layout, but I don't consider my skills to be professional grade by any means. I'm not sure I'd feel confident enough to tackle vintage Ives that should be done 'right'.
I know Joe Mania does professional restorations, his work is always completely authentic and top quality.
These folks, TTRP, look promising, although I have never actually worked with them on anything.
I have purchased some vintage Ives from "nighthawk" here on the forum, which had been restored by Hobby Horse, and although again I have not worked with them myself, I can say that the restorations they did are absolutely top notch.
I don't know if Chris Lonero has done any work for others, and I have not seen his work up close, but I must say that the restorations he has posted here on the forum are quite brilliant. I would say the same of Steve Eastman's work. The before-and-after pictures both these guys post are jaw-dropping.