Hey, Rock On!, Back in the days before I was a proud Parker owner, I had a 15+ year old Egg Harbor, with a glass hull. When I got it the hull was oxidized, and flat out dull. I got the 3M rubbing compound,( with all the sand in it.) On an overcast, and damp spring day I applied the compound to the hull on pieces of old jeans that I had cut into squares and were soaking in a pail of water. I applied it wet, and went over it with wet jean pieces. As it appeared to start drying, I hosed it down, and let it dry to a haze that I wiped off with a towel. Next I put on 2 coats of teflon wax/polish, typical of the Starbrite stuff @ $30. a bottle. Everyone around my boatyard came around asking if I had awlgrip applied, or what. After that a coat of teflon each year and we got thumbs up everywhere we cruised into. Electric buffing did help also. Good luck on that, you can do it............Papa
ps. I still use old jean squares to apply the teflon wax/polish to my Parker, and get compliments all the time.