DIY repair kits. Over the years, I have been asked many times to sell small amounts of our custom Brownstone patching material to homeowners and do it yourselfers. So, finally I have decided to do so. Please feel free to get in touch with us for your needs. We'll be glad to answer your questions and provide you with the closest color to match your property touch ups. All our Brownstone patching materials have been used in Landmarked properties all over NYC for the past two decades under the assigned presservationists suppervision for such jobs.