Showing that nightmare, dilapidated buildings can indeed be reborn, a Pontes-owned property at the corner of Canal and Greenwich Sts., which always looked about ready to collapse, is now, after a year and a half of renovation work, getting a paint job on its cornice and other finishing touches. In January 2013, the city’s Landmarks Preservation Commission had ordered that the vacant and dangerous Tribeca building be fixed up after it teetered increasingly toward collapse. The dramatic turnaround gives hope that the new owners of 43 MacDougal St., at King St., can do the same with their property, which has been an eyesore for many years, right in the heart of the small Charlton-King-Vandam Historic District.