Refinsihing metal like original

Someone on this forum, or elsewhere, has a refinishing service where they apply the proper parkerizing/bluing on A3s. I have saw photos of their work on a forum, but for the life of me I can't find them. Can anyone point me in the right direction?

Thanks
daveboy

Try chuckindenver. And whilst we're on the subject of original metal finishes, what type of finish would be correct for a mid '30's 1903 NM?

manganese phoshate, with a mix of blue parts, and polished bolt, on non USMC rifles.