This product is custom built to order. Our products are a Proven Fit for STOCK vehicles as listed in the Title and Description only and may not fit modified vehicles. Items are proven to stick when the area and backside of the cover are properly cleaned, degreased and dry. Adhesion problems are solely due to lack of end consumers proper preparation; therefore, we are not liable or responsible for replacement adhesions or loss of your product. We use 22 Gauge T304 #8 Mirror Polish Finish Stainless Steel. No pieces have welds or closed corners. These are folded sheet metal pieces made of Polished Stainless Steel and cannot be welded closed. Items that come with provided adhesives should be kept/stored and installed at 40-100 degrees. Cleaning suggestion: blow off dust, use a very soft cloth and a spritz of water or window cleaner to clean. Do not use over the counter stainless cleaners, terry cloth. Do not scrub.