I know EXACTLY
how you feel. I've spent the last 2 days, 7 hours both days, trying to remove the oxidation and make my egg shine. It looks better you're right, but not what I had hoped. It was only the rain that stopped me or I would have kept working til I couldn't see any longer.
I started off with scrubbing it with (top to bottom) with Barkeeprs Friend (5 min rinse), followed by Protect All Fiberglass oxidation remover and restorer (buffing off), then followed all of that up with NuFinish that sorta 'leveled' out the dullness.
I was also wondering what it would cost for me to take it somewhere and have someone do it with professional products and tools-of-the-trade (buffer!).
My neighbor walked over yesterday and said "If I spent as much time cleaning my house as you do polishing your trailer, my husband would be very happy!"