The old carpet had been gone for years when the boat came to me. I just had to remove it behind the hinges. The boats in the past I have replaced the carpet I used a heat gun to soften the glue enough to get hold of it and then pulled it off like peeling an old bumper sticker off a car bumper. The other boats I replaced the carpet on were also aluminum so I just used a carpet glue removing solvent to remove the glue once I removed the carpet. The hatches on this boat were clean when I got it but the boat floor still has the glue and rubber backing on it. So I will let you know when I get the glue off. There is 3M Adhesive remover and Goo-B-Gone that can be purchased. If you want to purchase straight chemical there is acetone which tends to evaporate quickly or xylene which is used to remove formica glue from cabinets when replacing the formica. If using the chemicals don't let it stand on the deck for extended periods of time. Best if poured on a rag. Be sure and wear rubber gloves and be in a well ventilated area.