My boat has always been stored in the garage. I just got her back from my boat guy who did a few additions and service work. It sat outside for several days and was parked in a gravel right beside a road where dump trucks are going by constantly from construction work close by. Well today I was wiping her down and noticed a slight dull or greyish look to the top cap especially the white. After scrubbing it with a cloth it did go away but I had to really give it some effort. The cap is still slick as a new one. I just wanted some info on what I need to do. Or what I can use to cut it easier. Thanks