6b to finish the skirting trim at the corners. a) Cutting Outside Corners Determine the location of the corner and cut a 5 1/8" section from the top edge of the spring lock. In the center, cut a "V" 3/4" deep and 1 1/8" wide at the top edge, and a small "V" cut at the bottom. Bend the front skirting trim and snap it into the corner. b) Cutting Inside Corner To cut the front skirting trim for inside corners, cut out a 1" or 2" tab in the top edge of the spring lock and make a small "V" cut through the bottom lip. Bend and snap the trim piece into place. Use an ordinary, long-handled car washing brush. This brush has soft bristles, and the handle fastens onto the end of the hose. It allows the siding to be washed just like a car. Avoid using stiff bristle brushes or abrasive cleaners, which may change the gloss of the cleaned area and cause the siding to look spotty. * Cleaning materials are listed in alphabetical order. ** ABTCO does not endorse proprietary products or processes and makes no warranties for the products referenced herein. Reference to proprietary names is for illustrative purposes only and is not intended to imply that there are not equally effective alternatives.