What 'real evidence'?
You haven't presented any. Just posting a photo of residue from an arc furnace in no way debunks Bob White's claim.
The high power voltage required to to create the molten artifact is most probably a feature of the craft's propulsion system. What else could it be?
That's why I say listen to the scientists who originally examined the artifact. There is no conspiracy or hoaxing here that I can see. If you find one please let me know.
When scientists find things, they publish their findings and post them in peer-reviewed journals. That's what scientists do and that's how they receive recognition, promotions, funding, and things like the Noble Prize. They don't simply talk about monumental discoveries on 10-year-old History Channel television shows.
Perhaps you saw the news this week of the paper published in Science about the water discoveries on Mars by the Curiosity rover team. If you recall, the announcement of the discovery took place about a year ago, but the paper was just published following submittal and peer review.
If finding something as mundane as water on another planet produces such excitement among the scientific community, why has this evidence of advanced alien life been ignored? Why haven't Bob White's scientists submitted their findings for peer-review and published their work. I would argue that even rudimentary findings on such an artifact would bring about millions in funding to do further studies. You do realize that such funding is the life blood for science.