How can I find out about my black velvet oil painting

Thousands of them are made every year. One in a million might be worth something, if it's old enough.
I doubt that you will find out where it was made (often Mexico), but you can try.
Some sell for kitsch value for about $100, tops.
Try this museum: The World's Most Obsessed Velvet Art Collectors Want You to See the Light at Velveteria in Chinatown | L.A. Weekly (http://www.laweekly.com/arts/the-worlds-most-obsessed-velvet-art-collectors-want-you-to-see-the-light-at-velveteria-in-chinatown-5510101)

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