Dear Larry,
Why would anyone bother to try, on the evidence of that picture? I don't find that amazing at all.
Plaudits do not make him any more competent, nor do they affect how the photograph was coloured, namely, Marshalls Oils or similar. They leave the door open to his being deliberately or ironically incompetent, i.e. parodying incompetence, but as it stands, I think I'll go for the first-approximation view that he WAS incompetent as a hand colorist.
Frances has been hand-colouring today. As she said, "If I make mistakes, I'll just call it folk art."
"Outsider artist"? Fine. At the risk of sounding like Hitler (with his views on 'degenerate Jewish art'), on the evidence of the original image, he can stay outside as far as I am concerned. The work shown in the second link is a good deal more interesting, but even a genius produces rubbish sometimes.
I am reminded of the time I turned on the wireless and heard an unfamiliar piece of music. "Sounds like Beethoven was short of money and took a quick-and-dirty commission," I said to my wife. When it finished it turned to be a very minor Beethoven piece commissioned for someone's wife's birthday... Still a lot more competent than the hand colouring, though.
Cheers,
R.