After earning $300,000 in winnings throughout his racing heyday, a horse named Metro Meteor has picked up a paintbrush and embarked on a moneymaking new career in retirement.The 9-yr-previous thoroughbred noticed his ultimate finish line in 2009 because of crippling knee injuries, but has became an equine Jackson Pollock seeing that he was once adopted by Maryland artist Ron Krajewski and his spouse, Wendy. “These horses, whe…